70-483 - Microsoft Practice Exam Questions - 100% Free

Question No : 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

Answer : A

Question discussion

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Triggernometry

I thought an overflow exception would be caught using a "try catch" block. I was wrong.

SilverCDCCD

You're correct. It would be *caught* by a try-catch block when thrown, but without the "checked" keyword it wouldn't be thrown in the first place.

s2n9

"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

akil

A. Checked

MKharrat

checked https://docs.microsoft.com/fr-fr/dotnet/csharp/language-reference/keywords/checked

vinayakkhavasi

stefvince

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 :) )

nguyenphanhuynh@gmail.com

Here is the answer for this question: https://msdn.microsoft.com/en-us/library/khy08726(v=vs.110).aspx

wfwf

Can I really put some comments here?

Question No : 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.)

Answer :

Question discussion

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edlias

If it is month/day/year, how is that the format in the answer puts the day first?

Thjof

The best answer according to the choices is "{0:t}", "{0:d}" and "{1:N2}".

jossai

should the second part be {1:mm/dd/yy} ??

jake_cyrus

no. the second dropdown still consumes the date variable so its still 0.

Thjof

That would try to format temp as a date. The second part should be {0:mm/dd/yy}, but there is no such choice.

stefvince

I think if you chose {0:dd/mm/yy}, you will have the "minute" part of the DateTime(to have the "month" part, you need to put "MM"), and the year will be displayed on 2 digits, not on 4, as required in your example.

MaurizioD

And what about the {1:N2} outside of the brackets?

sauravgupta

i am confused with this one

emag

output = string.Format("Temperature at {0:hh:mm tt} {0:MM/dd/yyyy} on {1:N2}", date, temp);

bezalel

string.Format("Temprature at {0:t} on {0:MM/dd/yyyy} is {1:N2}", DateTime.Now, 45.98555) for the time format {0:t} will also do.

emag

string.Format("Temperature at {0:hh:mm tt} {0:MM/dd/yyyy} on {1:N2}", date, temp);

feldrim

Like many comments below addressed the answer should be {0:t}, {0:mm/dd/yy} and {1:N2} but there is no choice like that.

augustoMF

The answer to this question is wrong. The correct format is {0:MM/dd/yyyy}

bvonavi

About temperature: {1:N2} produce 23.45 not 23-45

murat17

when I tested only "{0:t} {0:d} {1:N2}" gives the answer matches with the requirement.

iftakhar_bappy

Can anyone explain about About temperature: {1:N2} ??

brucelee888

The answer is for ENGLISH environment. If my OS is Chinese, the answer is wrong.

Question No : 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>

Answer : A

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

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triauth

The opening bracket < is only displayed with < at my side...

ZiTsi

For the use zero-based indices requirement I supposed we shall consider the queue.ElementAt(i), shalln't we?

Question No : 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())

Answer : B,D

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

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edlias

We cannot read until the reader is executed

curtiss2

Isn't the SqlConnection already open thanks to the using statement?

Question No : 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

Answer : C

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

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harryxiaxia

It's about precompiler.

Rien

I don't use any of the listed options because if your solution is in debug mode then anything in the #else isn't evaluated by the IDE for syntax errors. So if the name "imgPath" ever changes and you are in debug mode then you will get a syntax error in the #if block but not the #else block. Better use case is to set a local debug boolean in the #if structure and use that to dictate what to do instead so that the relevant code is always being scanned for syntax errors.

Question No : 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

Answer : C

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

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wfwf

Am I wrong? I cannot understand this even after reading 3time of the answer link.

jdavidnorena

When used together with other constraints, the new() constraint must be specified last. Reference: https://docs.microsoft.com/en-us/dotnet/csharp/programming-guide/generics/constraints-on-type-parameters

Question No : 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);

Answer : C

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

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AndriiNikolaiev

.. how to understand : “The release version of the code must not be impacted by any changes.” ? We should understand as: "Release version must not execute the code."

suhailmrs

Question No : 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.)

Answer :

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MattPS

{XmlRoot ("Prospect", Namespace = "http://prospect")} [XmlAttribute ("ProspectId")] [XmlElement ("FullName")] [XmlIgnore]

Question No : 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

Answer : E

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 No : 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

Answer : A

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 No : 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.)

Answer :

Question No : 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

Answer : A

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 No : 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

Answer : D

Question discussion

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nirwana101

event tog => event log

nimhum

Answer D is correct . Not Eventlog

mshiva447

Trace updates EventLog. Reference : C# 6.0 in a Nutshell.

harryxiaxia

Here is the answer: https://msdn.microsoft.com/en-us/library/system.diagnostics.eventlogtracelistener(v=vs.110).aspx

Question No : 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

Answer : B

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 discussion

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nirwana101

"You need to ensure that the GetData() from the Person class." misses some information like "You need to ensure that the GetData() can only be called from the Person class.".

behanp

And even with this wording, the "correct" answer would still be wrong. Question should ask for "access from the class itself and derived classes".

wesnell

the correct answer to this question is C, private

cvaldez.issc

The things said by @Wesnell are correct because the protected Word is for all classes inherited frontera this so the correct answer is C prívate

nadi82

correct because if you have a class as Employee derived from Person, you will still able to GetData() because Employee is Person

Rolighed

Question asks: "You need to ensure that the GetData() from the Person class." ??? Something is missing! From the answer I suppose it should be "You need to ensure that the GetData() can only be called from the Person class itself or classes derived from the Person class."

andreengels

"You need to ensure that the GetData() from the Person class." => That's an incomplete sentence

Question No : 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.)

Answer :

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Sachinsrk

I believe ReadLineAsync() should be there at ReadToEndAsync()

rodinot

The answer is right, check out the statement : "The GetData() must return a string value that contains the ENTIRE response from the web service."

engsimoes

It says in the question: "The GetData() method will retrieve several lines of data from a web service"

Edwin_k

public async void GetData(WebResponse response)

maurop76

the double "await" operator is intentionally or its an wrong?

Thjof

It's wrong.

metalcoder

I think that's wrong

curtiss2

Actually, I believe it's intentional. If I'm not mistaken, the second await is used to retrieve the value of the asynchronous read method. The first await is then used for the GetData method.

aravin

Yeah. Its typos

Edwin_k

it is wrong can't have 2 awaits, the code is suppose to be like this public async void GetData(WebResponse response) { string urltext; var sr = new StreamReader(response.GetResponseStream()); urltext = await sr.ReadToEndAsync(); }

stefvince

I would have returned a Task object, not void (I mean public async Task...)

suhailmrs

it will be urlText= await await sr.ReadToEndAsync(); then??? there will be 2 await on the same method call, right?

Rien

Looks like that syntax could potentially work in another scenario but with "sr.ReadToEndAsync()" it will cause a syntax error because the first await is expecting its argument to produce a task(of T) but it doesn't. I was able to get code with a double await in it to compile with a function whose signature looked like: "System.Threading.Tasks.Task(of System.Threading.Tasks.Task(of T)) SomeFunc()".

kiko

async await ReadToEndAsync();

kiko

async await ReadToEndAsync();

Microsoft 70-483

Programming in C#

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Microsoft 70-483

Programming in C#

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