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Exam Code: 350-401
Exam Name: Implementing Cisco Enterprise Network Core Technologies (ENCOR)
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Implementing Cisco Enterprise Network Core Technologies (ENCOR) 350-401 Practice Test 71

Question 700

During acceptance testing after extract each dictionary's hostname field in a loop or comprehension., which evidence is most relevant?

  1. The interpreter parses the corrected function and executes its nested block.
  2. The result contains hostnames in the same order as input records.
  3. A missing edge key returns the default without raising KeyError.
  4. The result parses as JSON and preserves the expected dictionary values.

Explanation

Correct Answer

B:

The result contains hostnames in the same order as input records. This is the targeted operational evidence for the change. Nested Python collections require key lookup per record. Merely entering the configuration or seeing a management session is less conclusive than observing the resulting behavior.

Incorrect Answers

A:

This observation validates another operation: Use consistent indentation within Python suites. Indentation defines Python block structure rather than cosmetic whitespace. It is not decisive evidence that the change under examination works as required. A relevant verification must exercise its particular control or forwarding outcome.

C:

This observation validates another operation: Use dictionary `.get` with an appropriate default instead of direct indexing. Dictionary get can avoid a KeyError for a missing key. It is not decisive evidence that the change under examination works as required. A relevant verification must exercise its particular control or forwarding outcome.

D:

This observation validates another operation: Use `json.dumps` to produce properly encoded JSON text. The dumps function serializes Python structures into JSON strings. It is not decisive evidence that the change under examination works as required. A relevant verification must exercise its particular control or forwarding outcome.

Question 701

A script mixes tabs and spaces and raises IndentationError. How should the team implement the required behavior?

  1. Use consistent indentation within Python suites.
  2. Recognize Python iteration over the list elements.
  3. Use `json.loads` on the JSON-encoded string.
  4. Use the equality comparison operator `==` in conditions.

Explanation

Correct Answer

A:

Indentation defines Python block structure rather than cosmetic whitespace. The most direct remediation is use consistent indentation within Python suites. A practical acceptance test is the interpreter parses the corrected function and executes its nested block. This distinguishes a configured intention from operational success.

Incorrect Answers

B:

This choice addresses a different situation: A Python script uses `for interface in interfaces` and operators expect one iteration per port. A for loop visits each value in the iterable in sequence. It does not specifically correct the issue here: a script mixes tabs and spaces and raises IndentationError.

C:

This choice addresses a different situation: A Python tool needs to convert JSON text received from an API into data objects. The loads function parses JSON text into Python-native values. It does not specifically correct the issue here: a script mixes tabs and spaces and raises IndentationError.

D:

This choice addresses a different situation: A script tests `if status == 200` but writes `if status = 200`. A single equals sign is assignment syntax, not an equality expression. It does not specifically correct the issue here: a script mixes tabs and spaces and raises IndentationError.

Question 702

An operator has applied the following change: use consistent indentation within Python suites. Which observation best confirms it works?

  1. A test list of three interfaces produces three loop-body executions.
  2. The parser returns a dictionary with accessible keys after valid input.
  3. The corrected code runs and enters the branch only for status 200.
  4. The interpreter parses the corrected function and executes its nested block.

Explanation

Correct Answer

D:

The interpreter parses the corrected function and executes its nested block. This is the targeted operational evidence for the change. Indentation defines Python block structure rather than cosmetic whitespace. Merely entering the configuration or seeing a management session is less conclusive than observing the resulting behavior.

Incorrect Answers

A:

This observation validates another operation: Recognize Python iteration over the list elements. A for loop visits each value in the iterable in sequence. It is not decisive evidence that the change under examination works as required. A relevant verification must exercise its particular control or forwarding outcome.

B:

This observation validates another operation: Use `json.loads` on the JSON-encoded string. The loads function parses JSON text into Python-native values. It is not decisive evidence that the change under examination works as required. A relevant verification must exercise its particular control or forwarding outcome.

C:

This observation validates another operation: Use the equality comparison operator `==` in conditions. A single equals sign is assignment syntax, not an equality expression. It is not decisive evidence that the change under examination works as required. A relevant verification must exercise its particular control or forwarding outcome.

Question 703

A REST request is rejected because a JSON object has a trailing comma. Which action most directly addresses this situation?

  1. Use JSON boolean `true` without Python capitalization.
  2. Enclose JSON property names and strings in double quotes.
  3. Remove the trailing comma from the JSON object.
  4. Use JSON `null` when the value should be absent rather than a literal word.

Explanation

Correct Answer

C:

Standard JSON does not allow trailing commas in objects or arrays. The most direct remediation is remove the trailing comma from the JSON object. A practical acceptance test is a strict JSON parser accepts the corrected payload. This distinguishes a configured intention from operational success.

Incorrect Answers

A:

This choice addresses a different situation: A client emits Python `True` inside a JSON payload. JSON literals `true` `false` and `null` have lowercase spelling. It does not specifically correct the issue here: a REST request is rejected because a JSON object has a trailing comma.

B:

This choice addresses a different situation: An API request uses single-quoted JSON object keys. JSON string syntax requires double quotation marks. It does not specifically correct the issue here: a REST request is rejected because a JSON object has a trailing comma.

D:

This choice addresses a different situation: An empty API field is being represented by the string `"null"`. A string and null carry different semantic types. It does not specifically correct the issue here: a REST request is rejected because a JSON object has a trailing comma.

Question 704

An operator has applied the following change: remove the trailing comma from the JSON object. Which observation best confirms it works?

  1. The JSON decoder returns a boolean value for the field.
  2. A strict JSON parser accepts the corrected payload.
  3. A strict decoder parses the object with the expected key/value pair.
  4. Decoded field is Python None rather than four-character text.

Explanation

Correct Answer

B:

A strict JSON parser accepts the corrected payload. This is the targeted operational evidence for the change. Standard JSON does not allow trailing commas in objects or arrays. Merely entering the configuration or seeing a management session is less conclusive than observing the resulting behavior.

Incorrect Answers

A:

This observation validates another operation: Use JSON boolean `true` without Python capitalization. JSON literals `true` `false` and `null` have lowercase spelling. It is not decisive evidence that the change under examination works as required. A relevant verification must exercise its particular control or forwarding outcome.

C:

This observation validates another operation: Enclose JSON property names and strings in double quotes. JSON string syntax requires double quotation marks. It is not decisive evidence that the change under examination works as required. A relevant verification must exercise its particular control or forwarding outcome.

D:

This observation validates another operation: Use JSON `null` when the value should be absent rather than a literal word. A string and null carry different semantic types. It is not decisive evidence that the change under examination works as required. A relevant verification must exercise its particular control or forwarding outcome.

Question 705

A client emits Python `True` inside a JSON payload. What is the most effective configuration or design response?

  1. Use JSON boolean `true` without Python capitalization.
  2. Represent the devices as a JSON array inside the correct object key.
  3. Build nested objects using braces and arrays using brackets as required.
  4. Escape the newline as `\n` inside the JSON string.

Explanation

Correct Answer

A:

JSON literals `true` `false` and `null` have lowercase spelling. The most direct remediation is use JSON boolean `true` without Python capitalization. A practical acceptance test is the JSON decoder returns a boolean value for the field. This distinguishes a configured intention from operational success.

Incorrect Answers

B:

This choice addresses a different situation: A JSON API expects a list of network devices and the engineer sends a scalar. JSON arrays use square brackets and contain ordered values. It does not specifically correct the issue here: a client emits Python `True` inside a JSON payload.

C:

This choice addresses a different situation: An automation client needs a nested JSON object for interface configuration. JSON hierarchy represents structured configuration directly. It does not specifically correct the issue here: a client emits Python `True` inside a JSON payload.

D:

This choice addresses a different situation: A JSON payload contains an unescaped newline inside an ordinary string. Control characters inside JSON strings require escape sequences. It does not specifically correct the issue here: a client emits Python `True` inside a JSON payload.

Question 706

After implementing use JSON boolean `true` without Python capitalization., which operational evidence should an engineer collect?

  1. Parser returns a list with the intended number of device objects.
  2. Decoded JSON retains the intended object and child properties.
  3. The JSON decoder preserves the newline as string content.
  4. The JSON decoder returns a boolean value for the field.

Explanation

Correct Answer

D:

The JSON decoder returns a boolean value for the field. This is the targeted operational evidence for the change. JSON literals `true` `false` and `null` have lowercase spelling. Merely entering the configuration or seeing a management session is less conclusive than observing the resulting behavior.

Incorrect Answers

A:

This observation validates another operation: Represent the devices as a JSON array inside the correct object key. JSON arrays use square brackets and contain ordered values. It is not decisive evidence that the change under examination works as required. A relevant verification must exercise its particular control or forwarding outcome.

B:

This observation validates another operation: Build nested objects using braces and arrays using brackets as required. JSON hierarchy represents structured configuration directly. It is not decisive evidence that the change under examination works as required. A relevant verification must exercise its particular control or forwarding outcome.

C:

This observation validates another operation: Escape the newline as `\n` inside the JSON string. Control characters inside JSON strings require escape sequences. It is not decisive evidence that the change under examination works as required. A relevant verification must exercise its particular control or forwarding outcome.

Question 707

A JSON API expects a list of network devices and the engineer sends a scalar. Which change should the network engineer prioritize?

  1. Enclose JSON property names and strings in double quotes.
  2. Use JSON `null` when the value should be absent rather than a literal word.
  3. Represent the devices as a JSON array inside the correct object key.
  4. Use a JSON string for dotted-decimal address and mask values.

Explanation

Correct Answer

C:

JSON arrays use square brackets and contain ordered values. The most direct remediation is represent the devices as a JSON array inside the correct object key. A practical acceptance test is parser returns a list with the intended number of device objects. This distinguishes a configured intention from operational success.

Incorrect Answers

A:

This choice addresses a different situation: An API request uses single-quoted JSON object keys. JSON string syntax requires double quotation marks. It does not specifically correct the issue here: a JSON API expects a list of network devices and the engineer sends a scalar.

B:

This choice addresses a different situation: An empty API field is being represented by the string `"null"`. A string and null carry different semantic types. It does not specifically correct the issue here: a JSON API expects a list of network devices and the engineer sends a scalar.

D:

This choice addresses a different situation: A device API sends IP prefix objects but one mask is unquoted as `255.255.255.0`. Dotted-quad addresses are text values, not JSON numeric literals. It does not specifically correct the issue here: a JSON API expects a list of network devices and the engineer sends a scalar.

Question 708

The change request says: represent the devices as a JSON array inside the correct object key. Which verification result is most decisive?

  1. A strict decoder parses the object with the expected key/value pair.
  2. Parser returns a list with the intended number of device objects.
  3. Decoded field is Python None rather than four-character text.
  4. A strict JSON parser accepts the dotted-decimal value as string.

Explanation

Correct Answer

B:

Parser returns a list with the intended number of device objects. This is the targeted operational evidence for the change. JSON arrays use square brackets and contain ordered values. Merely entering the configuration or seeing a management session is less conclusive than observing the resulting behavior.

Incorrect Answers

A:

This observation validates another operation: Enclose JSON property names and strings in double quotes. JSON string syntax requires double quotation marks. It is not decisive evidence that the change under examination works as required. A relevant verification must exercise its particular control or forwarding outcome.

C:

This observation validates another operation: Use JSON `null` when the value should be absent rather than a literal word. A string and null carry different semantic types. It is not decisive evidence that the change under examination works as required. A relevant verification must exercise its particular control or forwarding outcome.

D:

This observation validates another operation: Use a JSON string for dotted-decimal address and mask values. Dotted-quad addresses are text values, not JSON numeric literals. It is not decisive evidence that the change under examination works as required. A relevant verification must exercise its particular control or forwarding outcome.

Question 709

An API request uses single-quoted JSON object keys. Which remediation best resolves the described symptom?

  1. Enclose JSON property names and strings in double quotes.
  2. Build nested objects using braces and arrays using brackets as required.
  3. Escape the newline as `\n` inside the JSON string.
  4. Remove the trailing comma from the JSON object.

Explanation

Correct Answer

A:

JSON string syntax requires double quotation marks. The most direct remediation is enclose JSON property names and strings in double quotes. A practical acceptance test is a strict decoder parses the object with the expected key/value pair. This distinguishes a configured intention from operational success.

Incorrect Answers

B:

This choice addresses a different situation: An automation client needs a nested JSON object for interface configuration. JSON hierarchy represents structured configuration directly. It does not specifically correct the issue here: an API request uses single-quoted JSON object keys.

C:

This choice addresses a different situation: A JSON payload contains an unescaped newline inside an ordinary string. Control characters inside JSON strings require escape sequences. It does not specifically correct the issue here: an API request uses single-quoted JSON object keys.

D:

This choice addresses a different situation: A REST request is rejected because a JSON object has a trailing comma. Standard JSON does not allow trailing commas in objects or arrays. It does not specifically correct the issue here: an API request uses single-quoted JSON object keys.

Question 710

A post-change test follows this action: enclose JSON property names and strings in double quotes. Which result demonstrates success?

  1. Decoded JSON retains the intended object and child properties.
  2. The JSON decoder preserves the newline as string content.
  3. A strict JSON parser accepts the corrected payload.
  4. A strict decoder parses the object with the expected key/value pair.

Explanation

Correct Answer

D:

A strict decoder parses the object with the expected key/value pair. This is the targeted operational evidence for the change. JSON string syntax requires double quotation marks. Merely entering the configuration or seeing a management session is less conclusive than observing the resulting behavior.

Incorrect Answers

A:

This observation validates another operation: Build nested objects using braces and arrays using brackets as required. JSON hierarchy represents structured configuration directly. It is not decisive evidence that the change under examination works as required. A relevant verification must exercise its particular control or forwarding outcome.

B:

This observation validates another operation: Escape the newline as `\n` inside the JSON string. Control characters inside JSON strings require escape sequences. It is not decisive evidence that the change under examination works as required. A relevant verification must exercise its particular control or forwarding outcome.

C:

This observation validates another operation: Remove the trailing comma from the JSON object. Standard JSON does not allow trailing commas in objects or arrays. It is not decisive evidence that the change under examination works as required. A relevant verification must exercise its particular control or forwarding outcome.

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