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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 69

Question 680

After implementing apply application-control or script execution hardening appropriate to endpoint risk., which operational evidence should an engineer collect?

  1. An authorized test signature is blocked by the inline enforcement device.
  2. Unauthorized script execution is blocked or audited by the endpoint policy.
  3. Traffic between protected segments is logged and policy-enforced.
  4. The receiving switch shows the intended source group tag on classified traffic.

Explanation

Correct Answer

B:

Unauthorized script execution is blocked or audited by the endpoint policy. This is the targeted operational evidence for the change. Removing local admin is only one layer of endpoint attack surface reduction. 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: Deploy an inline IPS or NGFW prevention policy where blocking is required. Detection-only monitoring is not automatically active prevention. 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: Place appropriate internal segmentation firewall or distributed enforcement controls. Perimeter-only filtering misses lateral traffic inside a datacenter. 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: Ensure supported SGT classification and propagation between nodes. SGT policy requires group context at enforcement points. 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 681

A Python script uses `for interface in interfaces` and operators expect one iteration per port. Which action most directly addresses this situation?

  1. Recognize Python iteration over the list elements.
  2. Use dictionary `.get` with an appropriate default instead of direct indexing.
  3. Use `json.dumps` to produce properly encoded JSON text.
  4. Update the loop state or establish a reliable terminating condition.

Explanation

Correct Answer

A:

A for loop visits each value in the iterable in sequence. The most direct remediation is recognize Python iteration over the list elements. A practical acceptance test is a test list of three interfaces produces three loop-body executions. This distinguishes a configured intention from operational success.

Incorrect Answers

B:

This choice addresses a different situation: A Python script calls `devices.get('edge')` when the key may be absent. Dictionary get can avoid a KeyError for a missing key. It does not specifically correct the issue here: a Python script uses `for interface in interfaces` and operators expect one iteration per port.

C:

This choice addresses a different situation: A script needs to serialize a Python dictionary before a POST request. The dumps function serializes Python structures into JSON strings. It does not specifically correct the issue here: a Python script uses `for interface in interfaces` and operators expect one iteration per port.

D:

This choice addresses a different situation: A Python loop continues indefinitely because the counter never changes. A while loop keeps running while its boolean expression remains true. It does not specifically correct the issue here: a Python script uses `for interface in interfaces` and operators expect one iteration per port.

Question 682

An operator has applied the following change: recognize Python iteration over the list elements. Which observation best confirms it works?

  1. A missing edge key returns the default without raising KeyError.
  2. The result parses as JSON and preserves the expected dictionary values.
  3. The loop exits after the target condition changes to false.
  4. A test list of three interfaces produces three loop-body executions.

Explanation

Correct Answer

D:

A test list of three interfaces produces three loop-body executions. This is the targeted operational evidence for the change. A for loop visits each value in the iterable in sequence. 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 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.

B:

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.

C:

This observation validates another operation: Update the loop state or establish a reliable terminating condition. A while loop keeps running while its boolean expression remains true. 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 683

A Python script calls `devices.get('edge')` when the key may be absent. What is the most effective configuration or design response?

  1. Use `json.loads` on the JSON-encoded string.
  2. Use the equality comparison operator `==` in conditions.
  3. Use dictionary `.get` with an appropriate default instead of direct indexing.
  4. Catch the expected connection exception and handle failure per device.

Explanation

Correct Answer

C:

Dictionary get can avoid a KeyError for a missing key. The most direct remediation is use dictionary `.get` with an appropriate default instead of direct indexing. A practical acceptance test is a missing edge key returns the default without raising KeyError. This distinguishes a configured intention from operational success.

Incorrect Answers

A:

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 Python script calls `devices.get('edge')` when the key may be absent.

B:

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 Python script calls `devices.get('edge')` when the key may be absent.

D:

This choice addresses a different situation: A REST automation script crashes whenever a device is offline. Exception handling prevents one expected network error from aborting all jobs. It does not specifically correct the issue here: a Python script calls `devices.get('edge')` when the key may be absent.

Question 684

After implementing use dictionary `.get` with an appropriate default instead of direct indexing., which operational evidence should an engineer collect?

  1. The parser returns a dictionary with accessible keys after valid input.
  2. A missing edge key returns the default without raising KeyError.
  3. The corrected code runs and enters the branch only for status 200.
  4. An offline device is logged and later targets still process.

Explanation

Correct Answer

B:

A missing edge key returns the default without raising KeyError. This is the targeted operational evidence for the change. Dictionary get can avoid a KeyError for a missing key. 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.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.

D:

This observation validates another operation: Catch the expected connection exception and handle failure per device. Exception handling prevents one expected network error from aborting all jobs. 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 685

A Python tool needs to convert JSON text received from an API into data objects. Which change should the network engineer prioritize?

  1. Use `json.loads` on the JSON-encoded string.
  2. Use `json.dumps` to produce properly encoded JSON text.
  3. Update the loop state or establish a reliable terminating condition.
  4. Use Python slice syntax `ports[:2]`.

Explanation

Correct Answer

A:

The loads function parses JSON text into Python-native values. The most direct remediation is use `json.loads` on the JSON-encoded string. A practical acceptance test is the parser returns a dictionary with accessible keys after valid input. This distinguishes a configured intention from operational success.

Incorrect Answers

B:

This choice addresses a different situation: A script needs to serialize a Python dictionary before a POST request. The dumps function serializes Python structures into JSON strings. It does not specifically correct the issue here: a Python tool needs to convert JSON text received from an API into data objects.

C:

This choice addresses a different situation: A Python loop continues indefinitely because the counter never changes. A while loop keeps running while its boolean expression remains true. It does not specifically correct the issue here: a Python tool needs to convert JSON text received from an API into data objects.

D:

This choice addresses a different situation: A script should return the first two interface names from a list. List slicing with an exclusive end index selects the first two entries. It does not specifically correct the issue here: a Python tool needs to convert JSON text received from an API into data objects.

Question 686

The change request says: use `json.loads` on the JSON-encoded string. Which verification result is most decisive?

  1. The result parses as JSON and preserves the expected dictionary values.
  2. The loop exits after the target condition changes to false.
  3. For a three-element list the result contains exactly the first two names.
  4. The parser returns a dictionary with accessible keys after valid input.

Explanation

Correct Answer

D:

The parser returns a dictionary with accessible keys after valid input. This is the targeted operational evidence for the change. The loads function parses JSON text into Python-native 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: 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.

B:

This observation validates another operation: Update the loop state or establish a reliable terminating condition. A while loop keeps running while its boolean expression remains true. 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 Python slice syntax `ports[:2]`. List slicing with an exclusive end index selects the first two entries. 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 687

A script needs to serialize a Python dictionary before a POST request. Which remediation best resolves the described symptom?

  1. Use the equality comparison operator `==` in conditions.
  2. Catch the expected connection exception and handle failure per device.
  3. Use `json.dumps` to produce properly encoded JSON text.
  4. Account for Python truthiness of empty containers.

Explanation

Correct Answer

C:

The dumps function serializes Python structures into JSON strings. The most direct remediation is use `json.dumps` to produce properly encoded JSON text. A practical acceptance test is the result parses as JSON and preserves the expected dictionary values. This distinguishes a configured intention from operational success.

Incorrect Answers

A:

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 needs to serialize a Python dictionary before a POST request.

B:

This choice addresses a different situation: A REST automation script crashes whenever a device is offline. Exception handling prevents one expected network error from aborting all jobs. It does not specifically correct the issue here: a script needs to serialize a Python dictionary before a POST request.

D:

This choice addresses a different situation: A Python program uses `if value:` on an empty dictionary and expects true. Empty dictionaries and lists evaluate false in boolean contexts. It does not specifically correct the issue here: a script needs to serialize a Python dictionary before a POST request.

Question 688

A post-change test follows this action: use `json.dumps` to produce properly encoded JSON text. Which result demonstrates success?

  1. The corrected code runs and enters the branch only for status 200.
  2. The result parses as JSON and preserves the expected dictionary values.
  3. An offline device is logged and later targets still process.
  4. The branch is skipped for `{}` and entered for a nonempty mapping.

Explanation

Correct Answer

B:

The result parses as JSON and preserves the expected dictionary values. This is the targeted operational evidence for the change. The dumps function serializes Python structures into JSON strings. 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 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.

C:

This observation validates another operation: Catch the expected connection exception and handle failure per device. Exception handling prevents one expected network error from aborting all jobs. 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: Account for Python truthiness of empty containers. Empty dictionaries and lists evaluate false in boolean contexts. 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 689

A script tests `if status == 200` but writes `if status = 200`. How should the team implement the required behavior?

  1. Use the equality comparison operator `==` in conditions.
  2. Update the loop state or establish a reliable terminating condition.
  3. Use Python slice syntax `ports[:2]`.
  4. Extract each dictionary's hostname field in a loop or comprehension.

Explanation

Correct Answer

A:

A single equals sign is assignment syntax, not an equality expression. The most direct remediation is use the equality comparison operator `==` in conditions. A practical acceptance test is the corrected code runs and enters the branch only for status 200. This distinguishes a configured intention from operational success.

Incorrect Answers

B:

This choice addresses a different situation: A Python loop continues indefinitely because the counter never changes. A while loop keeps running while its boolean expression remains true. It does not specifically correct the issue here: a script tests `if status == 200` but writes `if status = 200`.

C:

This choice addresses a different situation: A script should return the first two interface names from a list. List slicing with an exclusive end index selects the first two entries. It does not specifically correct the issue here: a script tests `if status == 200` but writes `if status = 200`.

D:

This choice addresses a different situation: A device inventory is represented by a list of dictionaries and needs hostnames. Nested Python collections require key lookup per record. It does not specifically correct the issue here: a script tests `if status == 200` but writes `if status = 200`.

Question 690

During acceptance testing after use the equality comparison operator `==` in conditions., which evidence is most relevant?

  1. The loop exits after the target condition changes to false.
  2. For a three-element list the result contains exactly the first two names.
  3. The result contains hostnames in the same order as input records.
  4. The corrected code runs and enters the branch only for status 200.

Explanation

Correct Answer

D:

The corrected code runs and enters the branch only for status 200. This is the targeted operational evidence for the change. A single equals sign is assignment syntax, not an equality expression. 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: Update the loop state or establish a reliable terminating condition. A while loop keeps running while its boolean expression remains true. 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 Python slice syntax `ports[:2]`. List slicing with an exclusive end index selects the first two entries. 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: Extract each dictionary's hostname field in a loop or comprehension. Nested Python collections require key lookup per record. 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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