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Showing 1-100 of 236 Questions
Question #1 - Topic 1
You are developing code for a class named Account. The Account class includes the
following method:
You need to ensure that overflow exceptions are thrown when there is an error.
Which type of block should you use?
A. checked
B. try
C. using
D. unchecked
Question #2 - Topic 1
You are developing an application in C#.
The application will display the temperature and the time at which the temperature was
recorded. You have the following method (line numbers are included for reference only):
You need to ensure that the message displayed in the lblMessage object shows the time
formatted according to the following requirements:
✑ The time must be formatted as hour:minute AM/PM, for example 2:00 PM.
✑ The date must be formatted as month/day/year, for example 04/21/2013.
✑ The temperature must be formatted to have two decimal places, for example 23-
45.
Which code should you insert at line 04? (To answer, select the appropriate options in the
answer area.)
Question #3 - Topic 1
You are developing an application that includes a class named Order. The application will
store a collection of Order objects.
The collection must meet the following requirements:
✑ Use strongly typed members.
✑ Process Order objects in first-in-first-out order.
✑ Store values for each Order object.
✑ Use zero-based indices.
You need to use a collection type that meets the requirements.
Which collection type should you use?
A. Queue<T>
B. SortedList
C. LinkedList<T>
D. HashTable
E. Array<T>
Explanation:
Queues are useful for storing messages in the order they were received for sequential
processing. Objects stored in a Queue<T> are inserted at one end and removed from the
other.
http://msdn.microsoft.com/en-us/library/7977ey2c.aspx
Question #4 - Topic 1
You are developing an application that includes the following code segment. (Line numbers
are included for reference only.)
The GetCustomers() method must meet the following requirements:
✑ Connect to a Microsoft SQL Server database.
✑ Populate Customer objects with data from the database.
✑ Return an IEnumerable<Customer> collection that contains the populated
Customer objects.
You need to meet the requirements.
Which two actions should you perform? (Each correct answer presents part of the solution.
Choose two.)
A. Insert the following code segment at line 17: while (sqlDataReader.GetValues())
B. Insert the following code segment at line 14: sqlConnection.Open();
C. Insert the following code segment at line 14: sqlConnection.BeginTransaction();
D. Insert the following code segment at line 17: while (sqlDataReader.Read())
E. Insert the following code segment at line 17: while (sqlDataReader.NextResult())
Explanation:
SqlConnection.Open - Opens a database connection with the property settings specified by
the
ConnectionString.
http://msdn.microsoft.com/en-us/library/system.data.sqlclient.sqlconnection.open.aspx
SqlDataReader.Read - Advances the SqlDataReader to the next record.
http://msdn.microsoft.com/en-us/library/system.data.sqlclient.sqldatareader.read.aspx
Question #5 - Topic 1
You are developing an application that will process orders. The debug and release versions
of the application will display different logo images.
You need to ensure that the correct image path is set based on the build configuration.
Which code segment should you use?
A. Option A
B. Option B
C. Option C
D. Option D
Explanation:
There is no such constraint (unless you define one explicitly) RELEASE.
http://stackoverflow.com/questions/507704/will-if-release-work-like-if-debug-does-in-c
Question #6 - Topic 1
You are creating an application that manages information about zoo animals. The
application includes a class named Animal and a method named Save.
The Save() method must be strongly typed. It must allow only types inherited from the
Animal class that uses a constructor that accepts no parameters.
You need to implement the Save() method.
Which code segment should you use?
A. Option A
B. Option B
C. Option C
D. Option D
Explanation:
When you define a generic class, you can apply restrictions to the kinds of types that client
code can use for type arguments when it instantiates your class. If client code tries to
instantiate your class by using a type that is not allowed by a constraint, the result is a
compile-time error. These restrictions are called constraints. Constraints are specified by
using the where contextual keyword.
http://msdn.microsoft.com/en-us/library/d5x73970.aspx
Question #7 - Topic 1
You are debugging an application that calculates loan interest. The application includes the
following code. (Line numbers are included for reference only.)
You have the following requirements:
✑ The debugger must break execution within the Calculatelnterest() method when
the loanAmount variable is less than or equal to zero.
✑ The release version of the code must not be impacted by any changes.
You need to meet the requirements.
What should you do?
A. Insert the following code segment at tine 05: Debug.Write(loanAmount > 0);
B. Insert the following code segment at line 05: Trace.Write(loanAmount > 0);
C. Insert the following code segment at line 03: Debug.Assert(loanAmount > 0);
D. Insert the following code segment at line 03: Trace.Assert(loanAmount > 0);
Explanation:
By default, the Debug.Assert method works only in debug builds. Use the Trace.Assert
method if you want to do assertions in release builds. For more information, see Assertions
in Managed Code.
http://msdn.microsoft.com/en-us/library/kssw4w7z.aspx
Question #8 - Topic 1
You are developing an application that includes a class named Customer.
The application will output the Customer class as a structured XML document by using the
following code segment:
You need to ensure that the Customer class will serialize to XML.
How should you complete the relevant code? (To answer, drag the appropriate code
segments to the correct locations in the answer area. Each code segment may be used
once, more than once, or not at all. You may need to drag the split bar between panes or
scroll to view content.)
Question #9 - Topic 1
You are developing an application that includes a class named Order. The application will
store a collection of Order objects.
The collection must meet the following requirements:
✑ Internally store a key and a value for each collection item.
✑ Provide objects to iterators in ascending order based on the key.
✑ Ensure that item are accessible by zero-based index or by key.
You need to use a collection type that meets the requirements.
Which collection type should you use?
A. LinkedList
B. Queue
C. Array
D. HashTable
E. SortedList
Explanation:
SortedList<TKey, TValue> - Represents a collection of key/value pairs that are sorted by
key based on the associated IComparer<T> implementation.
http://msdn.microsoft.com/en-us/library/ms132319.aspx
Question #10 - Topic 1
You are developing an application that uses structured exception handling. The application
includes a class named ExceptionLogger.
The ExceptionLogger class implements a method named LogException by using the
following code segment:
public static void LogException(Exception ex)
You have the following requirements:
✑ Log all exceptions by using the LogException() method of the ExceptionLogger
class.
✑ Rethrow the original exception, including the entire exception stack.
You need to meet the requirements.
Which code segment should you use?
A. Option A
B. Option B
C. Option C
D. Option D
Explanation:
Once an exception is thrown, part of the information it carries is the stack trace. The stack
trace is a list of the method call hierarchy that starts with the method that throws the
exception and ends with the method that catches the exception. If an exception is re-
thrown by specifying the exception in the throw statement, the stack trace is restarted at
the current method and the list of method calls between the original method that threw the
exception and the current method is lost. To keep the original stack trace information with
the exception, use the throw statement without specifying the exception.
http://msdn.microsoft.com/en-us/library/ms182363(v=vs.110).aspx
Question #11 - Topic 1
You are testing an application. The application includes methods named CalculateInterest
and LogLine. The CalculateInterest() method calculates loan interest. The LogLine()
method sends diagnostic messages to a console window.
You have the following requirements:
✑ The CalculateInterest() method must run for all build configurations.
✑ The LogLine() method must be called only for debug builds.
You need to ensure that the methods run correctly.
How should you complete the relevant code? (To answer, drag the appropriate code
segments to the correct locations in the answer area. Each code segment may be used
once, more than once, or not at all. You may need to drag the split bar between panes or
scroll to view content.)
Question #12 - Topic 1
You are developing an application that accepts the input of dates from the user.
Users enter the date in their local format. The date entered by the user is stored in a string
variable named inputDate. The valid date value must be placed in a DateTime variable
named validatedDate.
You need to validate the entered date and convert it to Coordinated Universal Time (UTC).
The code must not cause an exception to be thrown.
Which code segment should you use?
A. Option A
B. Option B
C. Option C
D. Option D
Explanation:
AdjustToUniversal parses s and, if necessary, converts it to UTC.
Note: The DateTime.TryParse method converts the specified string representation of a
date and time to its DateTime equivalent using the specified culture-specific format
information and formatting style, and returns a value that indicates whether the conversion
succeeded.
Question #13 - Topic 1
You are developing an application that uses a .config file.
The relevant portion of the .config file is shown as follows:
You need to ensure that diagnostic data for the application writes to the event tog by using
the configuration specified in the .config file.
What should you include in the application code?
A. Option A
B. Option B
C. Option C
D. Option D
Question #14 - Topic 1
An application includes a class named Person. The Person class includes a method named
GetData.
You need to ensure that the GetData() from the Person class.
Which access modifier should you use for the GetData() method?
A. Internal
B. Protected
C. Private
D. Protected internal
E. Public
Explanation:
Protected - The type or member can be accessed only by code in the same class or
structure, or in a class that is derived from that class.
http://msdn.microsoft.com/en-us/library/ms173121.aspx
The protected keyword is a member access modifier. A protected member is accessible
within its class and by derived class instances.
Question #15 - Topic 1
You are developing an application that will include a method named GetData. The
GetData() method will retrieve several lines of data from a web service by using a
System.IO.StreamReader object.
You have the following requirements:
✑ The GetData() method must return a string value that contains the entire response
from the web service.
✑ The application must remain responsive while the GetData() method runs.
You need to implement the GetData() method.
How should you complete the relevant code? (To answer, drag the appropriate objects to
the correct locations in the answer area. Each object may be used once, more than once,
or not at all. You may need to drag the split bar between panes or scroll to view content.)
Question #16 - Topic 1
You are adding a public method named UpdateScore to a public class named ScoreCard.
The code region that updates the score field must meet the following requirements:
✑ It must be accessed by only one thread at a time.
✑ It must not be vulnerable to a deadlock situation.
You need to implement the UpdateScore() method.
What should you do?
A. Option A
B. Option B
C. Option C
D. Option D
Explanation:
http://blogs.msdn.com/b/bclteam/archive/2004/01/20/60719.aspx
Question #17 - Topic 1
You are developing an application by using C#.
The application includes an object that performs a long running process.
You need to ensure that the garbage collector does not release the object's resources until
the process completes.
Which garbage collector method should you use?
A. ReRegisterForFinalize()
B. SuppressFinalize()
C. Collect()
D. WaitForFullGCApproach()
Question #18 - Topic 1
You are developing an application that includes the following code segment. (Line numbers
are included for reference only.)
You need to ensure that the application accepts only integer input and prompts the user
each time non-integer input is entered.
Which code segment should you add at line 19?
A. If (!int.TryParse(sLine, out number))
B. If ((number = Int32.Parse(sLine)) == Single.NaN)
C. If ((number = int.Parse(sLine)) > Int32.MaxValue)
D. If (Int32.TryParse(sLine, out number))
Explanation:
B and C will throw exception when user enters non-integer value. D is exactly the opposite
what we want to achieve.
Int32.TryParse - Converts the string representation of a number to its 32-bit signed integer
equivalent. A return value indicates whether the conversion succeeded.
http://msdn.microsoft.com/en-us/library/f02979c7.aspx
Question #19 - Topic 1
You are developing an application by using C#. The application will process several objects
per second.
You need to create a performance counter to analyze the object processing.
Which three actions should you perform in sequence? (To answer, move the appropriate
actions from the list of actions to the answer area and arrange them in the correct order.)
Question #20 - Topic 1
You are reviewing the following code:
For each of the following statements, select Yes if the statement is true. Otherwise, select
No.
Question #21 - Topic 1
You are developing an application. The application includes a method named ReadFile that
reads data from a file.
The ReadFile() method must meet the following requirements:
✑ It must not make changes to the data file.
✑ It must allow other processes to access the data file.
✑ It must not throw an exception if the application attempts to open a data file that
does not exist.
You need to implement the ReadFile() method.
Which code segment should you use?
A. var fs = File.Open(Filename, FileMode.OpenOrCreate, FileAccess.Read, FileShare.ReadWrite);
B. var fs = File.Open(Filename, FileMode.Open, FileAccess.Read, FileShare.ReadWrite);
C. var fs = File.Open(Filename, FileMode.OpenOrCreate, FileAccess.Read, FileShare.Write);
D. var fs = File.ReadAllLines(Filename);
E. var fs = File.ReadAllBytes(Filename);
Explanation:
FileMode.OpenOrCreate - Specifies that the operating system should open a file if it exists;
otherwise, a new file should be created. If the file is opened with FileAccess.Read,
FileIOPermissionAccess.Read permission is required. If the file access is FileAccess.Write,
FileIOPermissionAccess.Write permission is required. If the file is opened with
FileAccess.ReadWrite, both FileIOPermissionAccess.Read and
FileIOPermissionAccess.Write permissions are required.
http://msdn.microsoft.com/en-us/library/system.io.filemode.aspx
FileShare.ReadWrite - Allows subsequent opening of the file for reading or writing.If this
flag is not specified, any request to open the file for reading or writing (by this process or
another process) will fail until the file is closed.However, even if this flag is specified,
additional permissions might still be needed to access the file.
http://msdn.microsoft.com/pl-pl/library/system.io.fileshare.aspx
Question #22 - Topic 1
You are adding a public method named UpdateGrade to a public class named ReportCard.
The code region that updates the grade field must meet the following requirements:
✑ It must be accessed by only one thread at a time.
✑ It must not be vulnerable to a deadlock situation.
You need to implement the UpdateGrade() method.
What should you do?
A. Option A
B. Option B
C. Option C
D. Option D
Question #23 - Topic 1
You are developing an application that will transmit large amounts of data between a client
computer and a server. You need to ensure the validity of the data by using a cryptographic
hashing algorithm. Which algorithm should you use?
A. ECDsa
B. RNGCryptoServiceProvider
C. Rfc2898DeriveBytes
D. HMACSHA512
Question #24 - Topic 1
You are developing an application. The application includes classes named Employee and
Person and an interface named IPerson.
The Employee class must meet the following requirements:
✑ It must either inherit from the Person class or implement the IPerson interface.
✑ It must be inheritable by other classes in the application.
You need to ensure that the Employee class meets the requirements.
Which two code segments can you use to achieve this goal? (Each correct answer
presents a complete solution. Choose two.)
A. Option A
B. Option B
C. Option C
D. Option D
Explanation:
Sealed - When applied to a class, the sealed modifier prevents other classes from
inheriting from it. http://msdn.microsoft.com/en-us/library/88c54tsw(v=vs.110).aspx
Question #25 - Topic 1
You are creating an application that manages information about your company's products.
The application includes a class named Product and a method named Save.
The Save() method must be strongly typed. It must allow only types inherited from the
Product class that use a constructor that accepts no parameters.
You need to implement the Save() method.
Which code segment should you use?
A. Option A
B. Option B
C. Option C
D. Option D
Question #26 - Topic 1
You are developing an application that includes the following code segment. (Line numbers
are included for reference only.)
The GetAnimals() method must meet the following requirements:
✑ Connect to a Microsoft SQL Server database.
✑ Create Animal objects and populate them with data from the database.
✑ Return a sequence of populated Animal objects.
You need to meet the requirements.
Which two actions should you perform? (Each correct answer presents part of the solution.
Choose two.)
A. Insert the following code segment at line 16: while(sqlDataReader.NextResult())
B. Insert the following code segment at line 13: sqlConnection.Open();
C. Insert the following code segment at line 13: sqlConnection.BeginTransaction();
D. Insert the following code segment at line 16: while(sqlDataReader.Read())
E. Insert the following code segment at line 16: while(sqlDataReader.GetValues())
Explanation:
SqlConnection.Open - Opens a database connection with the property settings specified by
the
ConnectionString.
http://msdn.microsoft.com/en-us/library/system.data.sqlclient.sqlconnection.open.aspx
SqlDataReader.Read - Advances the SqlDataReader to the next record.
http://msdn.microsoft.com/en-us/library/system.data.sqlclient.sqldatareader.read.aspx
Question #27 - Topic 1
You are testing an application. The application includes methods named CalculateInterest
and LogLine. The CalculateInterest() method calculates loan interest. The LogLine()
method sends diagnostic messages to a console window.
The following code implements the methods. (Line numbers are included for reference
only.)
You have the following requirements:
✑ The Calculatelnterest() method must run for all build configurations.
✑ The LogLine() method must run only for debug builds.
You need to ensure that the methods run correctly.
What are two possible ways to achieve this goal? (Each correct answer presents a
complete solution. Choose two.)
A. Insert the following code segment at line 01: #region DEBUG Insert the following code segment at line 10: #endregion
B. Insert the following code segment at line 10: [Conditional(MDEBUG")]
C. Insert the following code segment at line 05: #region DEBUG Insert the following code segment at line 07: #endregion
D. Insert the following code segment at line 01: #if DE30G Insert the following code segment at line 10: #endif
E. Insert the following code segment at line 01: [Conditional(MDEBUG")]
F. Insert the following code segment at line 05: #if DEBUG Insert the following code segment at line 07: #endif
G. Insert the following code segment at line 10: [Conditional("RELEASE")]
Explanation:
#if DEBUG: The code in here won't even reach the IL on release.
[Conditional("DEBUG")]: This code will reach the IL, however the calls to the method will
not execute unless DEBUG is on.
http://stackoverflow.com/questions/3788605/if-debug-vs-conditionaldebug
Question #28 - Topic 1
An application receives JSON data in the following format:
The application includes the following code segment. (Line numbers are included for
reference only.)
You need to ensure that the ConvertToName() method returns the JSON input string as a
Name object.
Which code segment should you insert at line 10?
A. Return ser.Desenalize (json, typeof(Name));
B. Return ser.ConvertToType<Name>(json);
C. Return ser.Deserialize<Name>(json);
D. Return ser.ConvertToType (json, typeof (Name));
Question #29 - Topic 1
You are developing an application that will populate an extensive XML tree from a
Microsoft SQL Server 2008 R2 database table named Contacts.
You are creating the XML tree. The solution must meet the following requirements:
✑ Minimize memory requirements.
✑ Maximize data processing speed.
You open the database connection. You need to create the XML tree.
How should you complete the relevant code? (To answer, drag the appropriate code
segments to the correct locations in the answer area. Each code segment may be used
once, more than once, or not at all. You may need to drag the split bar between panes or
scroll to view content.)
Question #30 - Topic 1
You are implementing a method named Calculate that performs conversions between
value types and reference types. The following code segment implements the method.
(Line numbers are included for reference only.)
You need to ensure that the application does not throw exceptions on invalid conversions.
Which code segment should you insert at line 04?
A. int balance = (int) (float)amountRef;
B. int balance = (int)amountRef;
C. int balance = amountRef;
D. int balance = (int) (double) amountRef;
Question #31 - Topic 1
You are developing an application by using C#. The application includes the following code
segment. (Line numbers are included for reference only.)
The DoWork() method must not throw any exceptions when converting the obj object to the
IDataContainer interface or when accessing the Data property.
You need to meet the requirements. Which code segment should you insert at line 07?
A. var dataContainer = (IDataContainer)obj;
B. dynamic dataContainer = obj;
C. var dataContainer = obj is IDataContainer;
D. var dataContainer = obj as IDataContainer;
Explanation:
As - The as operator is like a cast operation. However, if the conversion isn't possible, as
returns null instead of raising an exception.
http://msdn.microsoft.com/en-us/library/cscsdfbt(v=vs.110).aspx
Question #32 - Topic 1
You are developing a C# application that includes a class named Product. The following
code segment defines the Product class:
You implement System.ComponentModel.DataAnnotations.IValidateableObject interface to
provide a way to validate the Product object.
The Product object has the following requirements:
✑ The Id property must have a value greater than zero.
✑ The Name property must have a value other than empty or null.
You need to validate the Product object. Which code segment should you use?
A. Option A
B. Option B
C. Option C
D. Option D
Question #33 - Topic 1
You are developing a custom collection named LoanCollection for a class named Loan
class.
You need to ensure that you can process each Loan object in the LoanCollection collection
by using a foreach loop.
How should you complete the relevant code? (To answer, drag the appropriate code
segments to the correct locations in the answer area. Each code segment may be used
once, more than once, or not at all. You may need to drag the split bar between panes or
scroll to view content.)
Question #34 - Topic 1
You are developing a C# application that has a requirement to validate some string input
data by using the Regex class.
The application includes a method named ContainsHyperlink. The ContainsHyperlink()
method will verify the presence of a URI and surrounding markup.
The following code segment defines the ContainsHyperlink() method. (Line numbers are
included for reference only.)
The expression patterns used for each validation function are constant.
You need to ensure that the expression syntax is evaluated only once when the Regex
object is initially instantiated.
Which code segment should you insert at line 04?
A. Option A
B. Option B
C. Option C
D. Option D
Explanation:
RegexOptions.Compiled - Specifies that the regular expression is compiled to an
assembly.This yields faster execution but increases startup time.This value should not be
assigned to the Options property when calling the CompileToAssembly method.
http://msdn.microsoft.com/en-us/library/system.text.regularexpressions.regexoptions.aspx
Additional info
http://stackoverflow.com/questions/513412/how-does-regexoptions-compiled-work
Question #35 - Topic 1
You are developing an application by using C#.
The application includes an object that performs a long running process.
You need to ensure that the garbage collector does not release the object's resources until
the process completes.
Which garbage collector method should you use?
A. WaitForFullGCComplete()
B. SuppressFinalize()
C. WaitForFullGCApproach()
D. WaitForPendingFinalizers()
Question #36 - Topic 1
You are developing an application by using C#. The application will output the text string
"First Line" followed by the text string "Second Line".
You need to ensure that an empty line separates the text strings.
Which four code segments should you use in sequence? (To answer, move the appropriate
code segments to the answer area and arrange them in the correct order.)
Question #37 - Topic 1
You are creating a console application named App1.
App1 retrieves data from the Internet by using JavaScript Object Notation (JSON).
You are developing the following code segment (line numbers are included for reference
only):
You need to ensure that the code validates the JSON string.
Which code should you insert at line 03?
A. DataContractSerializer serializer = new DataContractSerializer();
B. var serializer = new DataContractSerializer();
C. XmlSerlalizer serializer = new XmlSerlalizer();
D. var serializer = new JavaScriptSerializer();
Explanation: The JavaScriptSerializer Class Provides serialization and deserialization
functionality for AJAX-enabled applications.
The JavaScriptSerializer class is used internally by the asynchronous communication layer
to serialize and deserialize the data that is passed between the browser and the Web
server. You cannot access that instance of the serializer. However, this class exposes a
public API. Therefore, you can use the class when you want to work with JavaScript Object
Notation (JSON) in managed code.
Question #38 - Topic 1
You are developing an application by using C#. The application includes the following code
segment. (Line numbers are included for reference only.)
The DoWork() method must throw an InvalidCastException exception if the obj object is not
of type IDataContainer when accessing the Data property.
You need to meet the requirements. Which code segment should you insert at line 07?
A. var dataContainer = (IDataContainer) obj;
B. var dataContainer = obj as IDataContainer;
C. var dataContainer = obj is IDataContainer;
D. dynamic dataContainer = obj;
Explanation:
http://msdn.microsoft.com/en-us/library/ms173105.aspx
Question #39 - Topic 1
You are developing an application. The application calls a method that returns an array of
integers named customerIds. You define an integer variable named customerIdToRemove
and assign a value to it. You declare an array named filteredCustomerIds.
You have the following requirements.
✑ Remove duplicate integers from the customerIds array.
✑ Sort the array in order from the highest value to the lowest value.
✑ Remove the integer value stored in the customerIdToRemove variable from the
customerIds array.
You need to create a LINQ query to meet the requirements.
Which code segment should you use?
A. Option A
B. Option B
C. Option C
D. Option D
Question #40 - Topic 1
You are creating an application that manages information about your company's products.
The application includes a class named Product and a method named Save.
The Save() method must be strongly typed. It must allow only types inherited from the
Product class that use a constructor that accepts no parameters.
You need to implement the Save() method. Which code segment should you use?
A. Option A
B. Option B
C. Option C
D. Option D
Explanation:
When you define a generic class, you can apply restrictions to the kinds of types that client
code can use for type arguments when it instantiates your class. If client code tries to
instantiate your class by using a type that is not allowed by a constraint, the result is a
compile-time error. These restrictions are called constraints.
Constraints are specified by using the where contextual keyword.
http://msdn.microsoft.com/en-us/library/d5x73970.aspx
Question #41 - Topic 1
You are developing an application by using C#. The application includes an array of
decimal values named loanAmounts. You are developing a LINQ query to return the values
from the array.
The query must return decimal values that are evenly divisible by two. The values must be
sorted from the lowest value to the highest value.
You need to ensure that the query correctly returns the decimal values.
How should you complete the relevant code? (To answer, drag the appropriate code
segments to the correct locations in the answer area. Each code segment may be used
once, more than once, or not at all. You may need to drag the split bar between panes or
scroll to view content.)
Question #42 - Topic 1
You are creating a class named Game.
The Game class must meet the following requirements:
✑ Include a member that represents the score for a Game instance.
✑ Allow external code to assign a value to the score member.
✑ Restrict the range of values that can be assigned to the score member.
You need to implement the score member to meet the requirements.
In which form should you implement the score member?
A. protected field
B. public static field
C. public static property
D. public property
Question #43 - Topic 1
You use the Task.Run() method to launch a long-running data processing operation. The
data processing operation often fails in times of heavy network congestion.
If the data processing operation fails, a second operation must clean up any results of the
first operation.
You need to ensure that the second operation is invoked only if the data processing
operation throws an unhandled exception.
What should you do?
A. Create a task within the operation, and set the Task.StartOnError property to true.
B. Create a TaskFactory object and call the ContinueWhenAll() method of the object.
C. Create a task by calling the Task.ContinueWith() method.
D. Use the TaskScheduler class to create a task and call the TryExecuteTask() method on the class.
Explanation:
Task.ContinueWith - Creates a continuation that executes asynchronously when the target
Task
completes.The returned Task will not be scheduled for execution until the current task has
completed, whether it completes due to running to completion successfully, faulting due to
an unhandled exception, or exiting out early due to being canceled.
http://msdn.microsoft.com/en-us/library/dd270696.aspx
Question #44 - Topic 1
You are developing a method named CreateCounters that will create performance counters
for an application. The method includes the following code. (Line numbers are included for
reference only.)
You need to ensure that Counter2 is available for use in Windows Performance Monitor
(PerfMon).
Which code segment should you insert at line 16?
A. CounterType = PerformanceCounterType.RawBase
B. CounterType = PerformanceCounterType.AverageBase
C. CounterType = PerformanceCounterType.SampleBase
D. CounterType = PerformanceCounterType.CounterMultiBase
Explanation:
PerformanceCounterType.AverageTimer32 - An average counter that measures the time it
takes, on average, to complete a process or operation. Counters of this type display a ratio
of the total elapsed time of the sample interval to the number of processes or operations
completed during that time. This counter type measures time in ticks of the system clock.
Formula: ((N 1 -N 0)/F)/(B 1 -B 0), where N 1 and N 0 are performance counter readings, B
1 and B 0 are their corresponding AverageBase values, and F is the number of ticks per
second. The value of F is factored into the equation so that the result can be displayed in
seconds.
Thus, the numerator represents the numbers of ticks counted during the last sample
interval, F represents the frequency of the ticks, and the denominator represents the
number of operations completed during the last sample interval. Counters of this type
include PhysicalDisk\ Avg. Disk sec/Transfer.
PerformanceCounterType.AverageBase - A base counter that is used in the calculation of
time or count averages, such as AverageTimer32 and AverageCount64. Stores the
denominator for calculating a counter to present "time per operation" or "count per
operation"..
http://msdn.microsoft.com/en-us/library/system.diagnostics.performancecountertype.aspx
Question #45 - Topic 1
You are developing an application that includes a class named BookTracker for tracking
library books. The application includes the following code segment. (Line numbers are
included for reference only.)
You need to add a user to the BookTracker instance. What should you do?
A. Option A
B. Option B
C. Option C
D. Option D
Question #46 - Topic 1
You have the following code:
To answer, complete each statement according to the information presented in the code.
Question #47 - Topic 1
You are implementing a library method that accepts a character parameter and returns a
string.
If the lookup succeeds, the method must return the corresponding string value. If the
lookup fails, the method must return the value "invalid choice."
You need to implement the lookup algorithm.
How should you complete the relevant code? (To answer, select the correct keyword in
each drop-down list in the answer area.)
Question #48 - Topic 1
An application receives JSON data in the following format:
The application includes the following code segment. (Line numbers are included for
reference only.)
You need to ensure that the ConvertToName() method returns the JSON input string as a
Name object.
Which code segment should you insert at line 10?
A. Return ser.ConvertToType<Name>(json);
B. Return ser.DeserializeObject(json);
C. Return ser.Deserialize<Name>(json);
D. Return (Name)ser.Serialize(json);
Explanation:
JavaScriptSerializer.Deserialize<T> - Converts the specified JSON string to an object of
type T.
http://msdn.microsoft.com/en-us/library/bb355316.aspx
Question #49 - Topic 1
An application includes a class named Person. The Person class includes a method named
GetData.
You need to ensure that the GetData() method can be used only by the Person class and
not by any class derived from the Person class.
Which access modifier should you use for the GetData() method?
A. Public
B. Protected internal
C. Internal
D. Private
E. Protected
Explanation:
The GetData() method should be private. It would then only be visible within the Person
class.
Question #50 - Topic 1
You are modifying an application that processes leases. The following code defines the
Lease class. (Line numbers are included for reference only.)
Leases are restricted to a maximum term of 5 years. The application must send a
notification message if a lease request exceeds 5 years.
You need to implement the notification mechanism.
Which two actions should you perform? (Each correct answer presents part of the solution.
Choose two.)
A. Option A
B. Option B
C. Option C
D. Option D
E. Option E
F. Option F
Question #51 - Topic 1
You are developing an application that includes a class named Warehouse. The
Warehouse class includes a static property named Inventory- The Warehouse class is
defined by the following code segment. (Line numbers are included for reference only.)
You have the following requirements:
✑ Initialize the _inventory field to an Inventory instance.
✑ Initialize the _inventory field only once.
✑ Ensure that the application code acquires a lock only when the _inventory object
must be instantiated.
You need to meet the requirements.
Which three code segments should you insert in sequence at line 09? (To answer, move
the appropriate code segments from the list of code segments to the answer area and
arrange them in the correct order.)
Question #52 - Topic 1
You are developing an application that will transmit large amounts of data between a client
computer and a server.
You need to ensure the validity of the data by using a cryptographic hashing algorithm.
Which algorithm should you use?
A. HMACSHA256
B. RNGCryptoServiceProvider
C. DES
D. Aes
Explanation:
The .NET Framework provides the following classes that implement hashing algorithms:
✑ HMACSHA1.
✑ MACTripleDES.
✑ MD5CryptoServiceProvider.
✑ RIPEMD160.
✑ SHA1Managed.
✑ SHA256Managed.
✑ SHA384Managed.
✑ SHA512Managed.
HMAC variants of all of the Secure Hash Algorithm (SHA), Message Digest 5 (MD5), and
RIPEMD-160 algorithms.
CryptoServiceProvider implementations (managed code wrappers) of all the SHA
algorithms.
Cryptography Next Generation (CNG) implementations of all the MD5 and SHA algorithms.
http://msdn.microsoft.com/en-us/library/92f9ye3s.aspx#hash_values
Question #53 - Topic 1
You are developing an application that will convert data into multiple output formats.
The application includes the following code. (Line numbers are included for reference only.)
You are developing a code segment that will produce tab-delimited output. All output
routines implement the following interface:
You need to minimize the completion time of the GetOutput() method.
Which code segment should you insert at line 06?
A. Option A
B. Option B
C. Option C
D. Option D
Explanation:
A String object concatenation operation always creates a new object from the existing
string and the new data.
A StringBuilder object maintains a buffer to accommodate the concatenation of new data.
New data is appended to the buffer if room is available; otherwise, a new, larger buffer is
allocated, data from the original buffer is copied to the new buffer, and the new data is then
appended to the new buffer.
The performance of a concatenation operation for a String or StringBuilder object depends
on the frequency of memory allocations. A String concatenation operation always allocates
memory, whereas a StringBuilder concatenation operation allocates memory only if the
StringBuilder object buffer is too small to accommodate the new data. Use the String class
if you are concatenating a fixed number of String objects. In that case, the compiler may
even combine individual concatenation operations into a single operation. Use a
StringBuilder object if you are concatenating an arbitrary number of strings; for example, if
you're using a loop to concatenate a random number of strings of user input.
http://msdn.microsoft.com/en-us/library/system.text.stringbuilder(v=vs.110).aspx
Question #54 - Topic 1
You are developing an application. The application includes classes named Mammal and
Animal and an interface named IAnimal.
The Mammal class must meet the following requirements:
✑ It must either inherit from the Animal class or implement the IAnimal interface.
✑ It must be inheritable by other classes in the application.
You need to ensure that the Mammal class meets the requirements.
Which two code segments can you use to achieve this goal? (Each correct answer
presents a complete solution. Choose two.)
A. Option A
B. Option B
C. Option C
D. Option D
Explanation:
When applied to a class, the sealed modifier prevents other classes from inheriting from it.
http://msdn.microsoft.com/en-us/library/88c54tsw(v=vs.110).aspx
Question #55 - Topic 1
You are developing an assembly that will be used by multiple applications.
You need to install the assembly in the Global Assembly Cache (GAC).
Which two actions can you perform to achieve this goal? (Each correct answer presents a
complete solution. Choose two.)
A. Use the Assembly Registration tool (regasm.exe) to register the assembly and to copy the assembly to the GAC.
B. Use the Strong Name tool (sn.exe) to copy the assembly into the GAC.
C. Use Microsoft Register Server (regsvr32.exe) to add the assembly to the GAC.
D. Use the Global Assembly Cache tool (gacutil.exe) to add the assembly to the GAC.
E. Use Windows Installer 2.0 to add the assembly to the GAC.
Explanation:
There are two ways to deploy an assembly into the global assembly cache:
Use an installer designed to work with the global assembly cache. This is the preferred
option for installing assemblies into the global assembly cache.
Use a developer tool called the Global Assembly Cache tool (Gacutil.exe), provided by the
Windows
Software Development Kit (SDK).
Note:
In deployment scenarios, use Windows Installer 2.0 to install assemblies into the global
assembly cache. Use the Global Assembly Cache tool only in development scenarios,
because it does not provide assembly reference counting and other features provided
when using the Windows Installer.
http://msdn.microsoft.com/en-us/library/yf1d93sz%28v=vs.110%29.aspx
Question #56 - Topic 1
You are developing a class named ExtensionMethods.
You need to ensure that the ExtensionMethods class implements the IsEmail() extension
method on string objects.
How should you complete the relevant code? (To answer, drag the appropriate code
segments to the correct locations in the answer area. Each code segment may be used
once, more than once, or not at all. You may need to drag the split bar between panes or
scroll to view content.)
Question #57 - Topic 1
You are implementing a method that creates an instance of a class named User. The User
class contains a public event named Renamed. The following code segment defines the
Renamed event:
Public event EventHandler<RenameEventArgs> Renamed;
You need to create an event handler for the Renamed event by using a lambda expression.
How should you complete the relevant code? (To answer, drag the appropriate code
segments to the correct locations in the answer area. Each code segment may be used
once, more than once, or not at all. You may need to drag the split bar between panes or
scroll to view content.)
Question #58 - Topic 1
You are developing an application. The application converts a Location object to a string by
using a method named WriteObject. The WriteObject() method accepts two parameters, a
Location object and an XmlObjectSerializer object.
The application includes the following code. (Line numbers are included for reference only.)
You need to serialize the Location object as a JSON object.
Which code segment should you insert at line 20?
A. New DataContractSerializer(typeof(Location))
B. New XmlSerializer(typeof(Location))
C. New NetDataContractSenalizer()
D. New DataContractJsonSerializer(typeof(Location))
Explanation:
The DataContractJsonSerializer class serializes objects to the JavaScript Object Notation
(JSON) and deserializes JSON data to objects.
Use the DataContractJsonSerializer class to serialize instances of a type into a JSON
document and to deserialize a JSON document into an instance of a type.
Question #59 - Topic 1
You are developing an application by using C#. You provide a public key to the
development team during development.
You need to specify that the assembly is not fully signed when it is built.
Which two assembly attributes should you include in the source code? (Each correct
answer presents part of the solution. Choose two.)
A. AssemblyFlagsAttribute
B. AssemblyKeyFileAttribute
C. AssemblyConfigurationAttribute
D. AssemblyDelaySignAttribute
Question #60 - Topic 1
You are developing an application that will transmit large amounts of data between a client
computer and a server. You need to ensure the validity of the data by using a cryptographic
hashing algorithm. Which algorithm should you use?
A. RSA
B. HMACSHA2S6
C. Aes
D. RNGCryptoServiceProvider
Question #61 - Topic 1
You are developing a class named ExtensionMethods.
You need to ensure that the ExtensionMethods class implements the IsEmail() method on
string objects.
How should you complete the relevant code? (To answer, drag the appropriate code
segments to the correct locations in the answer area. Each code segment may be used
once, more than once, or not at all. You may need to drag the split bar between panes or
scroll to view content.)
Question #62 - Topic 1
You are developing an application that uses several objects. The application includes the
following code segment. (Line numbers are included for reference only.)
You need to evaluate whether an object is null.
Which code segment should you insert at line 03?
A. Option A
B. Option B
C. Option C
D. Option D
Explanation: Use the == operator to compare values and in this case also use the null
literal.
Question #63 - Topic 1
You are developing an application that includes a class named BookTracker for tracking
library books. The application includes the following code segment. (Line numbers are
included for reference only.)
You need to add a book to the BookTracker instance.
What should you do?
A. Option A
B. Option B
C. Option C
D. Option D
Question #64 - Topic 1
You use the Task.Run() method to launch a long-running data processing operation. The
data processing operation often fails in times of heavy network congestion.
If the data processing operation fails, a second operation must clean up any results of the
first operation.
You need to ensure that the second operation is invoked only if the data processing
operation throws an unhandled exception.
What should you do?
A. Create a TaskCompletionSource<T> object and call the TrySetException() method of the object.
B. Create a task by calling the Task.ContinueWith() method.
C. Examine the Task.Status property immediately after the call to the Task.Run() method.
D. Create a task inside the existing Task.Run() method by using the AttachedToParent option.
Question #65 - Topic 1
You are developing an application that includes a class named UserTracker. The
application includes the following code segment. (Line numbers are included for reference
only.)
You need to add a user to the UserTracker instance.
What should you do?
A. Option A
B. Option B
C. Option C
D. Option D
Question #66 - Topic 1
You are developing an application. The application calls a method that returns an array of
integers named employeeIds. You define an integer variable named employeeIdToRemove
and assign a value to it. You declare an array named filteredEmployeeIds.
You have the following requirements:
✑ Remove duplicate integers from the employeeIds array.
✑ Sort the array in order from the highest value to the lowest value.
✑ Remove the integer value stored in the employeeIdToRemove variable from the
employeeIds array.
You need to create a LINQ query to meet the requirements.
Which code segment should you use?
A. Option A
B. Option B
C. Option C
D. Option D
Question #67 - Topic 1
You are developing an application that includes a class named Kiosk. The Kiosk class
includes a static property named Catalog. The Kiosk class is defined by the following code
segment. (Line numbers are included for reference only.)
You have the following requirements:
✑ Initialize the _catalog field to a Catalog instance.
✑ Initialize the _catalog field only once.
✑ Ensure that the application code acquires a lock only when the _catalog object
must be instantiated.
You need to meet the requirements.
Which three code segments should you insert in sequence at line 09? (To answer, move
the appropriate code segments from the list of code segments to the answer area and
arrange them in the correct order.)
Question #68 - Topic 1
You are creating a class named Data that includes a dictionary object named _data.
You need to allow the garbage collection process to collect the references of the _data
object.
How should you complete the relevant code? (To answer, drag the appropriate code
segments to the correct locations in the answer area. Each code segment may be used
once, more than once, or not at all. You may need to drag the split bar between panes or
scroll to view content.)
Question #69 - Topic 1
You have a method named GetCustomerIDs that returns a list of integers. Each entry in the
list represents a customer ID that is retrieved from a list named Customers. The Customers
list contains 1,000 rows.
Another developer creates a method named ValidateCustomer that accepts an integer
parameter and returns a Boolean value. ValidateCustomer returns true if the integer
provided references a valid customer. ValidateCustomer can take up to one second to run.
You need to create a method that returns a list of valid customer IDs. The code must
execute in the shortest amount of time.
What should you do? (Develop the solution by selecting and ordering the required code
snippets. You may not need all of the code snippets.)
Question #70 - Topic 1
You are developing an application by using C#. You provide a public key to the
development team during development.
You need to specify that the assembly is not fully signed when it is built.
Which two assembly attributes should you include in the source code? (Each correct
answer presents part of the solution. Choose two.)
A. AssemblyKeyNameAttribute
B. ObfuscateAssemblyAttribute
C. AssemblyDelaySignAttribute
D. AssemblyKeyFileAttribute
Explanation:
http://msdn.microsoft.com/en-us/library/t07a3dye(v=vs.110).aspx
Question #71 - Topic 1
You are developing an application that implements a set of custom exception types. You
declare the custom exception types by using the following code segments:
The application includes a function named DoWork that throws .NET Framework
exceptions and custom exceptions.
The application contains only the following logging methods:
The application must meet the following requirements:
✑ When AdventureWorksValidationException exceptions are caught, log the
information by using the static void Log (AdventureWorksValidationException ex)
method.
✑ When AdventureWorksDbException or other AdventureWorksException
exceptions are caught, log the information by using the static void I oq(
AdventureWorksException ex) method.
You need to meet the requirements.
How should you complete the relevant code? (To answer, drag the appropriate code
segments to the correct locations in the answer area. Each code segment may be used
once, more than once, or not at all. You may need to drag the split bar between panes or
scroll to view content.)
Question #72 - Topic 1
You are developing an application by using C#. The application will process several objects
per second.
You need to create a performance counter to analyze the object processing.
Which three actions should you perform in sequence? (To answer, move the appropriate
actions from the list of actions to the answer area and arrange them in the correct order.)
Question #73 - Topic 1
An application will upload data by using HTML form-based encoding. The application uses
a method named SendMessage.
The SendMessage() method includes the following code. (Line numbers are included for
reference only.)
The receiving URL accepts parameters as form-encoded values.
You need to send the values intA and intB as form-encoded values named a and b,
respectively.
Which code segment should you insert at line 04?
A. Option A
B. Option B
C. Option C
D. Option D
Explanation:
WebClient.UploadValuesTaskAsync - Uploads the specified name/value collection to the
resource identified by the specified URI as an asynchronous operation using a task object.
These methods do not block the calling thread.
http://msdn.microsoft.com/en-us/library/system.net.webclient.uploadvaluestaskasync.aspx
Question #74 - Topic 1
You are debugging an application that calculates loan interest. The application includes the
following code. (Line numbers are included for reference only.)
You need to ensure that the debugger breaks execution within the CalculateInterest()
method when the loanAmount variable is less than or equal to zero in all builds of the
application.
What should you do?
A. Insert the following code segment at line 03: Trace.Assert(loanAmount > 0);
B. Insert the following code segment at line 03: Debug.Assert(loanAmount > 0);
C. Insert the following code segment at line 05: Debug.Write(loanAmount > 0);
D. Insert the following code segment at line 05: Trace.Write(loanAmount > 0);
Explanation:
By default, the Debug.Assert method works only in debug builds. Use the Trace.Assert
method if you want to do assertions in release builds. For more information, see Assertions
in Managed Code. http://msdn.microsoft.com/en-us/library/kssw4w7z.aspx
Question #75 - Topic 1
You are developing an application that uses structured exception handling. The application
includes a class named Logger. The Logger class implements a method named Log by
using the following code segment:
public static void Log(Exception ex) { }
You have the following requirements:
✑ Log all exceptions by using the Log() method of the Logger class.
✑ Rethrow the original exception, including the entire exception stack.
You need to meet the requirements. Which code segment should you use?
A. Option A
B. Option B
C. Option C
D. Option D
Question #76 - Topic 1
You are creating a console application by using C#.
You need to access the assembly found in the file named car.dll.
Which code segment should you use?
A. Assembly.Load();
B. Assembly.GetExecutingAssembly();
C. This.GetType();
D. Assembly.LoadFile("car.dll");
Explanation:
Assembly.LoadFile - Loads the contents of an assembly file on the specified path.
http://msdn.microsoft.com/en-us/library/b61s44e8.aspx
Question #77 - Topic 1
You are creating a class named Employee. The class exposes a string property named
EmployeeType. The following code segment defines the Employee class. (Line numbers
are included for reference only.)
The EmployeeType property value must meet the following requirements:
✑ The value must be accessed only by code within the Employee class or within a
class derived from the Employee class.
✑ The value must be modified only by code within the Employee class.
You need to ensure that the implementation of the EmployeeType property meets the
requirements.
Which two actions should you perform? (Each correct answer represents part of the
complete solution. Choose two.)
A. Replace line 03 with the following code segment: public string EmployeeType
B. Replace line 06 with the following code segment: protected set;
C. Replace line 05 with the following code segment: private get;
D. Replace line 05 with the following code segment: protected get;
E. Replace line 03 with the following code segment: protected string EmployeeType
F. Replace line 06 with the following code segment: private set;
Question #78 - Topic 1
You are developing an application. The application converts a Location object to a string by
using a method named WriteObject.
The WriteObject() method accepts two parameters, a Location object and an
XmlObjectSerializer object.
The application includes the following code. (Line numbers are included for reference only.)
You need to serialize the Location object as XML.
Which code segment should you insert at line 20?
A. new XmlSerializer(typeof(Location))
B. new NetDataContractSerializer()
C. new DataContractJsonSerializer(typeof (Location))
D. new DataContractSerializer(typeof(Location))
Explanation:
The code is using [DataContract] attribute here so need to used DataContractSerializer
class.
Question #79 - Topic 1
You are developing an application that uses the Microsoft ADO.NET Entity Framework to
retrieve order information from a Microsoft SQL Server database. The application includes
the following code. (Line numbers are included for reference only.)
The application must meet the following requirements:
✑ Return only orders that have an OrderDate value other than null.
✑ Return only orders that were placed in the year specified in the year parameter.
You need to ensure that the application meets the requirements. Which code segment
should you insert at line 08?
A. Option A
B. Option B
C. Option C
D. Option D
Question #80 - Topic 1
You are creating a console application by using C#.
You need to access the application assembly.
Which code segment should you use?
A. Assembly.GetAssembly(this);
B. this.GetType();
C. Assembly.Load();
D. Assembly.GetExecutingAssembly();
Explanation:
Assembly.GetExecutingAssembly - Gets the assembly that contains the code that is
currently executing.
http://msdn.microsoft.com/en-
us/library/system.reflection.assembly.getexecutingassembly(v=vs.110).aspx
Assembly.GetAssembly - Gets the currently loaded assembly in which the specified class
is defined.
http://msdn.microsoft.com/en-us/library/system.reflection.assembly.getassembly.aspx
Question #81 - Topic 1
You are developing an application that uses the Microsoft ADO.NET Entity Framework to
retrieve order information from a Microsoft SQL Server database. The application includes
the following code. (Line numbers are included for reference only.)
The application must meet the following requirements:
✑ Return only orders that have an OrderDate value other than null.
✑ Return only orders that were placed in the year specified in the OrderDate property
or in a later year.
You need to ensure that the application meets the requirements.
Which code segment should you insert at line 08?
A. Where order.OrderDate.Value != null && order.OrderDate.Value.Year > = year
B. Where order.OrderDate.Value = = null && order.OrderDate.Value.Year = = year
C. Where order.OrderDate.HasValue && order.OrderDate.Value.Year = = year
D. Where order.OrderDate.Value.Year = = year
Explanation: *For the requirement to use an OrderDate value other than null use:
OrderDate.Value != null
*For the requirement to use an OrderDate value for this year or a later year use:
OrderDate.Value>= year
Question #82 - Topic 1
You are developing an application that will include a method named GetData. The
GetData() method will retrieve several lines of data from a web service by using a
System.IO.StreamReader object.
You have the following requirements:
✑ The GetData() method must return a string value that contains the first line of the
response from the web service.
✑ The application must remain responsive while the GetData() method runs.
You need to implement the GetData() method.
How should you complete the relevant code? (To answer, drag the appropriate objects to
the correct locations in the answer area. Each object may be used once, more than once,
or not at all. You may need to drag the split bar between panes or scroll to view content.)
Question #83 - Topic 1
You have the following class:
You need to implement IEquatable. The Equals method must return true if both ID and
Name are set to the identical values. Otherwise, the method must return false. Equals must
not throw an exception.
What should you do? (Develop the solution by selecting and ordering the required code
snippets. You may not need all of the code snippets.)
Question #84 - Topic 1
You are developing a method named CreateCounters that will create performance counters
for an application.
The method includes the following code. (Line numbers are included for reference only.)
You need to ensure that Counter1 is available for use in Windows Performance Monitor
(PerfMon).
Which code segment should you insert at line 16?
A. CounterType = PerformanccCounterType.RawBase
B. CounterType = PerformanceCounterType.AverageBase
C. CounterType = PerformanceCounterType.SampleBase
D. CounterType = PerformanceCounterType.CounterMultiBase
Explanation:
PerformanceCounterType.SampleBase - A base counter that stores the number of
sampling interrupts taken and is used as a denominator in the sampling fraction. The
sampling fraction is the number of samples that were 1 (or true) for a sample interrupt.
Check that this value is greater than zero before using it as the denominator in a
calculation of SampleFraction.
PerformanceCounterType.SampleFraction - A percentage counter that shows the average
ratio of hits to all operations during the last two sample intervals. Formula: ((N 1 - N 0) / (D
1 - D 0)) x 100, where the numerator represents the number of successful operations
during the last sample interval, and the denominator represents the change in the number
of all operations (of the type measured) completed during the sample interval, using
counters of type SampleBase. Counters of this type include Cache\Pin Read Hits %.
http://msdn.microsoft.com/en-us/library/system.diagnostics.performancecountertype.aspx
Question #85 - Topic 1
You are developing an application that includes a Windows Communication Foundation
(WCF) service. The service includes a custom TraceSource object named ts and a method
named DoWork. The application must meet the following requirements:
✑ Collect trace information when the DoWork() method executes.
✑ Group all traces for a single execution of the DoWork() method as an activity that
can be viewed in the WCF Service Trace Viewer Tool.
You need to ensure that the application meets the requirements.
How should you complete the relevant code? (To answer, select the correct code segment
from each drop-down list in the answer area.)
Question #86 - Topic 1
An application serializes and deserializes XML from streams. The XML streams are in the
following format:
The application reads the XML streams by using a DataContractSerializer object that is
declared by the following code segment:
var ser = new DataContractSerializer(typeof(Name));
You need to ensure that the application preserves the element ordering as provided in the
XML stream.
How should you complete the relevant code? (To answer, drag the appropriate attributes to
the correct locations in the answer area-Each attribute may be used once, more than once,
or not at all. You may need to drag the split bar between panes or scroll to view content.)
Question #87 - Topic 1
You develop an application that displays information from log files when errors occur. The
application will prompt the user to create an error report that sends details about the error
and the session to the administrator.
When a user opens a log file by using the application, the application throws an exception
and closes.
The application must preserve the original stack trace information when an exception
occurs during this process.
You need to implement the method that reads the log files.
How should you complete the relevant code? (To answer, drag the appropriate code
segments to the correct locations in the answer area. Each code segment may be used
once, more than once, or not at all. You may need to drag the split bar between panes or
scroll to view content.)
Question #88 - Topic 1
You are creating a class named Employee. The class exposes a string property named
EmployeeType. The following code segment defines the Employee class. (Line numbers
are included for reference only.)
The EmployeeType property value must be accessed and modified only by code within the
Employee class or within a class derived from the Employee class.
You need to ensure that the implementation of the EmployeeType property meets the
requirements.
Which two actions should you perform? (Each correct answer represents part of the
complete solution. Choose two.)
A. Replace line 05 with the following code segment: protected get;
B. Replace line 06 with the following code segment: private set;
C. Replace line 03 with the following code segment: public string EmployeeType
D. Replace line 05 with the following code segment: private get;
E. Replace line 03 with the following code segment: protected string EmployeeType
F. Replace line 06 with the following code segment: protected set;
Question #89 - Topic 1
You are implementing a method named FloorTemperature that performs conversions
between value types and reference types. The following code segment implements the
method. (Line numbers are included for reference only.)
You need to ensure that the application does not throw exceptions on invalid conversions.
Which code segment should you insert at line 04?
A. int result = (int)degreesRef;
B. int result = (int)(double)degreesRef;
C. int result = degreesRef;
D. int result = (int)(float)degreesRef;
Question #90 - Topic 1
You have the following code:
For each of the following statements, select Yes if the statement is true. Otherwise, select
No.
Question #91 - Topic 1
You have a List object that is generated by executing the following code:
You have a method that contains the following code (line numbers are included for
reference only):
You need to alter the method to use a lambda statement.
How should you rewrite lines 03 through 06 of the method?
A. Option A
B. Option B
C. Option C
D. Option D
Question #92 - Topic 1
You are developing an application that implements a set of custom exception types. You
declare the custom exception types by using the following code segments:
The application includes a function named DoWork that throws .NET Framework
exceptions and custom exceptions. The application contains only the following logging
methods:
The application must meet the following requirements:
✑ When ContosoValidationException exceptions are caught, log the information by
using the static void Log (ContosoValidationException ex) method.
✑ When ContosoDbException or other ContosoException exceptions are caught, log
the information by using the static void Log(ContosoException ex) method.
You need to meet the requirements.
How should you complete the relevant code? (To answer, drag the appropriate code
segments to the correct locations in the answer area. Each code segment may be used
once, more than once, or not at all. You may need to drag the split bar between panes or
scroll to view content.)
Question #93 - Topic 1
You are developing an application by using C#.
You have the following requirements:
✑ Support 32-bit and 64-bit system configurations.
✑ Include pre-processor directives that are specific to the system configuration.
✑ Deploy an application version that includes both system configurations to testers.
✑ Ensure that stack traces include accurate line numbers.
You need to configure the project to avoid changing individual configuration settings every
time you deploy the application to testers.
Which two actions should you perform? (Each correct answer presents part of the solution.
Choose two.)
A. Update the platform target and conditional compilation symbols for each application configuration.
B. Create two application configurations based on the default Release configuration.
C. Optimize the application through address rebasing in the 64-bit configuration.
D. Create two application configurations based on the default Debug configuration.
Question #94 - Topic 1
You are developing an application that will transmit large amounts of data between a client
computer and a server. You need to ensure the validity of the data by using a cryptographic
hashing algorithm. Which algorithm should you use?
A. DES
B. HMACSHA512
C. RNGCryptoServiceProvider
D. ECDsa
Question #95 - Topic 1
You are developing an application by using C#.
The application includes an object that performs a long running process.
You need to ensure that the garbage collector does not release the object's resources until
the process completes.
Which garbage collector method should you use?
A. WaitForFullGCComplete()
B. WaitForFullGCApproach()
C. KeepAlive()
D. WaitForPendingFinalizers()
Explanation: The GC.KeepAlive method references the specified object, which makes it
ineligible for garbage collection from the start of the current routine to the point where this
method is called.
The purpose of the KeepAlive method is to ensure the existence of a reference to an object
that is at risk of being prematurely reclaimed by the garbage collector.
The KeepAlive method performs no operation and produces no side effects other than
extending the lifetime of the object passed in as a parameter.
Question #96 - Topic 1
You have the following code (line numbers are included for reference only):
You need to identify the missing line of code at line 15. Which line of code should you
identify?
A. using (fooSqlConn.BeginTransaction())
B. while (fooSqlReader.Read())
C. while (fooSqlReader.NextResult())
D. while (fooSqlReader.GetBoolean(0))
Question #97 - Topic 1
You are developing a class named Temperature.
You need to ensure that collections of Temperature objects are sortable.
How should you complete the relevant code segment? (To answer, drag the appropriate
code segments to the correct locations in the answer area. Each code segment may be
used once, more than once, or not at all. You may need to drag the split bar between
panes or scroll to view content.)
Question #98 - Topic 1
You are developing an application by using C#.
The application includes an object that performs a long running process.
You need to ensure that the garbage collector does not release the object's resources until
the process completes.
Which garbage collector method should you use?
A. WaitForFullGCComplete()
B. SuppressFinalize()
C. collect()
D. RemoveMemoryPressure()
Question #99 - Topic 1
You are developing an application by using C#.
The application includes an object that performs a long running process.
You need to ensure that the garbage collector does not release the object's resources until
the process completes.
Which garbage collector method should you use?
A. RemoveMemoryPressure()
B. ReRegisterForFinalize()
C. WaitForFullGCComplete()
D. KeepAlive()
Question #100 - Topic 1
You are developing an application that will transmit large amounts of data between a client
computer and a server. You need to ensure the validity of the data by using a cryptographic
hashing algorithm. Which algorithm should you use?
A. RSA
B. Aes
C. HMACSHA256
D. DES
C
Topic 2, Volume B
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Training C
Comments for Question #1 - Topic 1 (11)
May 15, 2018, 11:34 AM
A. Checked
March 9, 2018, 09:39 PM
A
March 9, 2018, 09:39 PM
A
November 14, 2017, 07:11 AM
Can I really put some comments here?
October 18, 2017, 05:42 PM
Here is the answer for this question: https://msdn.microsoft.com/en-us/library/khy08726(v=vs.110).aspx
October 12, 2017, 06:28 PM
Is the extraCents variable a member of the class? I thought it would be prefixed with this. (I know it is not the aim of the question :) )
September 12, 2017, 12:31 PM
A
July 31, 2017, 11:09 PM
checked https://docs.microsoft.com/fr-fr/dotnet/csharp/language-reference/keywords/checked
July 19, 2017, 06:46 PM
A. Checked
June 4, 2017, 06:27 AM
"For the arithmetic, casting, or conversion operation to throw an OverflowException, the operation must occur in a checked context. By default, arithmetic operations and overflows in Visual Basic are checked; in C#, they are not. If the operation occurs in an unchecked context, the result is truncated by discarding any high-order bits that do not fit into the destination type. " Source: https://msdn.microsoft.com/en-us/library/system.overflowexception(v=vs.110).aspx
May 28, 2017, 10:29 PM
I thought an overflow exception would be caught using a "try catch" block. I was wrong.