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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 76

Question 750

A post-change test follows this action: review endpoint base path version and object identifier. Which result demonstrates success?

  1. An authenticated request returns structured device records.
  2. The task endpoint reports completed or failed state for the submitted job.
  3. The API returns the selected edge configuration payload.
  4. The corrected URL with valid object ID returns the intended resource.

Explanation

Correct Answer

D:

The corrected URL with valid object ID returns the intended resource. This is the targeted operational evidence for the change. API endpoint/version and resource IDs determine resource addressing. 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 documented Catalyst Center API inventory endpoint. Management APIs expose structured device inventory to automation clients. 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: Poll the documented task or execution status returned by the initial request. Asynchronous controller operations may return task IDs before completion. 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 documented SD-WAN Manager REST APIs with correct credentials. SD-WAN Manager exposes management endpoints distinct from edge packet forwarding. 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 751

A RESTCONF GET returns status 200 with an unexpected representation. Which action most directly addresses this situation?

  1. Interpret 201 as successful resource creation.
  2. Validate JSON syntax and required modeled fields against the request schema.
  3. Check Accept media type and parse the returned YANG-modeled payload.
  4. Grant the required API authorization rather than reauthenticating blindly.

Explanation

Correct Answer

C:

Successful HTTP status does not establish that the parser expects the correct content type. The most direct remediation is check Accept media type and parse the returned YANG-modeled payload. A practical acceptance test is response has supported YANG JSON/XML media type and decodes successfully. This distinguishes a configured intention from operational success.

Incorrect Answers

A:

This choice addresses a different situation: An API POST returns HTTP 201 Created and the script treats it as error. HTTP 201 indicates a resource was created. It does not specifically correct the issue here: a RESTCONF GET returns status 200 with an unexpected representation.

B:

This choice addresses a different situation: An API call returns 400 Bad Request after a configuration payload edit. HTTP 400 typically indicates invalid request data or syntax. It does not specifically correct the issue here: a RESTCONF GET returns status 200 with an unexpected representation.

D:

This choice addresses a different situation: An API returns 403 Forbidden with a recognized token. HTTP 403 indicates the authenticated principal lacks permission. It does not specifically correct the issue here: a RESTCONF GET returns status 200 with an unexpected representation.

Question 752

An operator has applied the following change: check Accept media type and parse the returned YANG-modeled payload. Which observation best confirms it works?

  1. The response identifies the newly created resource and follow-up GET succeeds.
  2. Response has supported YANG JSON/XML media type and decodes successfully.
  3. Corrected payload is accepted without the previous 400.
  4. The same request succeeds only for a properly privileged identity.

Explanation

Correct Answer

B:

Response has supported YANG JSON/XML media type and decodes successfully. This is the targeted operational evidence for the change. Successful HTTP status does not establish that the parser expects the correct content type. 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: Interpret 201 as successful resource creation. HTTP 201 indicates a resource was created. 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: Validate JSON syntax and required modeled fields against the request schema. HTTP 400 typically indicates invalid request data or syntax. 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: Grant the required API authorization rather than reauthenticating blindly. HTTP 403 indicates the authenticated principal lacks permission. 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 753

An API POST returns HTTP 201 Created and the script treats it as error. What is the most effective configuration or design response?

  1. Interpret 201 as successful resource creation.
  2. Interpret the 204 as successful operation without response body.
  3. Refresh or correct the authentication credential instead of repeating unchanged requests.
  4. Use the correct modeled resource path and list key.

Explanation

Correct Answer

A:

HTTP 201 indicates a resource was created. The most direct remediation is interpret 201 as successful resource creation. A practical acceptance test is the response identifies the newly created resource and follow-up GET succeeds. This distinguishes a configured intention from operational success.

Incorrect Answers

B:

This choice addresses a different situation: An API responds 204 No Content to a DELETE. HTTP 204 deliberately returns no content after success. It does not specifically correct the issue here: an API POST returns HTTP 201 Created and the script treats it as error.

C:

This choice addresses a different situation: An API returns 401 Unauthorized and the script retries endlessly. HTTP 401 usually means authentication is missing or invalid. It does not specifically correct the issue here: an API POST returns HTTP 201 Created and the script treats it as error.

D:

This choice addresses a different situation: A RESTCONF resource returns 404 Not Found when an invalid interface key is supplied. A valid API root can still return 404 for a nonexistent child resource. It does not specifically correct the issue here: an API POST returns HTTP 201 Created and the script treats it as error.

Question 754

After implementing interpret 201 as successful resource creation., which operational evidence should an engineer collect?

  1. The resource is absent on a subsequent authenticated GET.
  2. A valid credential yields an authorized response.
  3. GET succeeds against the correct interface path.
  4. The response identifies the newly created resource and follow-up GET succeeds.

Explanation

Correct Answer

D:

The response identifies the newly created resource and follow-up GET succeeds. This is the targeted operational evidence for the change. HTTP 201 indicates a resource was created. 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: Interpret the 204 as successful operation without response body. HTTP 204 deliberately returns no content after success. 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: Refresh or correct the authentication credential instead of repeating unchanged requests. HTTP 401 usually means authentication is missing or invalid. 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 correct modeled resource path and list key. A valid API root can still return 404 for a nonexistent child resource. 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 755

An API responds 204 No Content to a DELETE. Which change should the network engineer prioritize?

  1. Validate JSON syntax and required modeled fields against the request schema.
  2. Grant the required API authorization rather than reauthenticating blindly.
  3. Interpret the 204 as successful operation without response body.
  4. Resolve the current resource state or conflicting operation before retrying.

Explanation

Correct Answer

C:

HTTP 204 deliberately returns no content after success. The most direct remediation is interpret the 204 as successful operation without response body. A practical acceptance test is the resource is absent on a subsequent authenticated GET. This distinguishes a configured intention from operational success.

Incorrect Answers

A:

This choice addresses a different situation: An API call returns 400 Bad Request after a configuration payload edit. HTTP 400 typically indicates invalid request data or syntax. It does not specifically correct the issue here: an API responds 204 No Content to a DELETE.

B:

This choice addresses a different situation: An API returns 403 Forbidden with a recognized token. HTTP 403 indicates the authenticated principal lacks permission. It does not specifically correct the issue here: an API responds 204 No Content to a DELETE.

D:

This choice addresses a different situation: An API returns HTTP 409 Conflict during concurrent configuration changes. Conflict means the request cannot complete under current server state. It does not specifically correct the issue here: an API responds 204 No Content to a DELETE.

Question 756

The change request says: interpret the 204 as successful operation without response body. Which verification result is most decisive?

  1. Corrected payload is accepted without the previous 400.
  2. The resource is absent on a subsequent authenticated GET.
  3. The same request succeeds only for a properly privileged identity.
  4. The subsequent compatible update succeeds without overriding unrelated state.

Explanation

Correct Answer

B:

The resource is absent on a subsequent authenticated GET. This is the targeted operational evidence for the change. HTTP 204 deliberately returns no content after success. 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: Validate JSON syntax and required modeled fields against the request schema. HTTP 400 typically indicates invalid request data or syntax. 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: Grant the required API authorization rather than reauthenticating blindly. HTTP 403 indicates the authenticated principal lacks permission. 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: Resolve the current resource state or conflicting operation before retrying. Conflict means the request cannot complete under current server state. 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 757

An API call returns 400 Bad Request after a configuration payload edit. Which remediation best resolves the described symptom?

  1. Validate JSON syntax and required modeled fields against the request schema.
  2. Refresh or correct the authentication credential instead of repeating unchanged requests.
  3. Use the correct modeled resource path and list key.
  4. Honor Retry-After/backoff limits before attempting more requests.

Explanation

Correct Answer

A:

HTTP 400 typically indicates invalid request data or syntax. The most direct remediation is validate JSON syntax and required modeled fields against the request schema. A practical acceptance test is corrected payload is accepted without the previous 400. This distinguishes a configured intention from operational success.

Incorrect Answers

B:

This choice addresses a different situation: An API returns 401 Unauthorized and the script retries endlessly. HTTP 401 usually means authentication is missing or invalid. It does not specifically correct the issue here: an API call returns 400 Bad Request after a configuration payload edit.

C:

This choice addresses a different situation: A RESTCONF resource returns 404 Not Found when an invalid interface key is supplied. A valid API root can still return 404 for a nonexistent child resource. It does not specifically correct the issue here: an API call returns 400 Bad Request after a configuration payload edit.

D:

This choice addresses a different situation: An API is rate limited with HTTP 429 Too Many Requests. 429 signals throttling rather than an invalid path or credential. It does not specifically correct the issue here: an API call returns 400 Bad Request after a configuration payload edit.

Question 758

A post-change test follows this action: validate JSON syntax and required modeled fields against the request schema. Which result demonstrates success?

  1. A valid credential yields an authorized response.
  2. GET succeeds against the correct interface path.
  3. Requests succeed at an acceptable paced rate without repeated throttling.
  4. Corrected payload is accepted without the previous 400.

Explanation

Correct Answer

D:

Corrected payload is accepted without the previous 400. This is the targeted operational evidence for the change. HTTP 400 typically indicates invalid request data or syntax. 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: Refresh or correct the authentication credential instead of repeating unchanged requests. HTTP 401 usually means authentication is missing or invalid. 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 the correct modeled resource path and list key. A valid API root can still return 404 for a nonexistent child resource. 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: Honor Retry-After/backoff limits before attempting more requests. 429 signals throttling rather than an invalid path or credential. 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 759

An API returns 401 Unauthorized and the script retries endlessly. How should the team implement the required behavior?

  1. Grant the required API authorization rather than reauthenticating blindly.
  2. Resolve the current resource state or conflicting operation before retrying.
  3. Refresh or correct the authentication credential instead of repeating unchanged requests.
  4. Investigate server-side failure and logs before modifying client payload blindly.

Explanation

Correct Answer

C:

HTTP 401 usually means authentication is missing or invalid. The most direct remediation is refresh or correct the authentication credential instead of repeating unchanged requests. A practical acceptance test is a valid credential yields an authorized response. This distinguishes a configured intention from operational success.

Incorrect Answers

A:

This choice addresses a different situation: An API returns 403 Forbidden with a recognized token. HTTP 403 indicates the authenticated principal lacks permission. It does not specifically correct the issue here: an API returns 401 Unauthorized and the script retries endlessly.

B:

This choice addresses a different situation: An API returns HTTP 409 Conflict during concurrent configuration changes. Conflict means the request cannot complete under current server state. It does not specifically correct the issue here: an API returns 401 Unauthorized and the script retries endlessly.

D:

This choice addresses a different situation: An API returns status 500 after the server accepts a syntactically valid call. HTTP 500 indicates an internal server error. It does not specifically correct the issue here: an API returns 401 Unauthorized and the script retries endlessly.

Question 760

During acceptance testing after refresh or correct the authentication credential instead of repeating unchanged requests., which evidence is most relevant?

  1. The same request succeeds only for a properly privileged identity.
  2. A valid credential yields an authorized response.
  3. The subsequent compatible update succeeds without overriding unrelated state.
  4. Server issue is resolved and the same valid request completes successfully.

Explanation

Correct Answer

B:

A valid credential yields an authorized response. This is the targeted operational evidence for the change. HTTP 401 usually means authentication is missing or invalid. 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: Grant the required API authorization rather than reauthenticating blindly. HTTP 403 indicates the authenticated principal lacks permission. 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: Resolve the current resource state or conflicting operation before retrying. Conflict means the request cannot complete under current server state. 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: Investigate server-side failure and logs before modifying client payload blindly. HTTP 500 indicates an internal server error. 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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