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Exam Code: CAD

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Corresponding Certification: Certified Application Developer

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ServiceNow CAD Practice Test 54

Question 530

A developer applies this approach: Implement a properly authenticated Scripted REST API with validated inputs and ACL-aware writes. What platform behavior or outcome should be expected for the stated design?

  1. End-to-end diagnostics distinguish authentication failures from schema or mapping errors.
  2. A Scripted REST resource can expose controlled server behavior to authorized external clients.
  3. Duplicate delivery should not create duplicate business side effects.
  4. Outbound REST integration exchanges data with an external service over HTTP.

Explanation

Correct Answer

B:

The expected result for Scripted inbound REST API is: A Scripted REST resource can expose controlled server behavior to authorized external clients.

Incorrect Answers

A:

This describes REST debugging evidence and its associated action, Inspect the request method, URL, authentication configuration and REST execution logs, rather than the consequence of the stated approach.

C:

This describes Idempotent external callbacks and its associated action, Use a stable external event ID and a tested idempotent create-or-update strategy, rather than the consequence of the stated approach.

D:

This describes Outbound REST Message and its associated action, Configure an outbound REST Message or supported REST action with the correct method and endpoint, rather than the consequence of the stated approach.

Question 531

A vendor needs an authorized HTTP endpoint to submit status callbacks into a scoped ServiceNow application. A teammate suggests a different change: Inspect the request method, URL, authentication configuration and REST execution logs. That change does not resolve the actual requirement. Which correction is most appropriate?

  1. Inspect the request method, URL, authentication configuration and REST execution logs
  2. Use a stable external event ID and a tested idempotent create-or-update strategy
  3. Implement a properly authenticated Scripted REST API with validated inputs and ACL-aware writes
  4. Configure an outbound REST Message or supported REST action with the correct method and endpoint

Explanation

Correct Answer

C:

Use the indicated corrective approach. A Scripted REST resource can expose controlled server behavior to authorized external clients. This meets the specific requirement for Scripted inbound REST API.

Incorrect Answers

A:

Not the appropriate correction: Inspect the request method, URL, authentication configuration and REST execution logs is relevant to REST debugging evidence. End-to-end diagnostics distinguish authentication failures from schema or mapping errors.

B:

Not the appropriate correction: Use a stable external event ID and a tested idempotent create-or-update strategy is relevant to Idempotent external callbacks. Duplicate delivery should not create duplicate business side effects.

D:

Not the appropriate correction: Configure an outbound REST Message or supported REST action with the correct method and endpoint is relevant to Outbound REST Message. Outbound REST integration exchanges data with an external service over HTTP.

Question 532

A developer proposes this approach: Implement a properly authenticated Scripted REST API with validated inputs and ACL-aware writes. Which business requirement is the strongest reason to choose it?

  1. A REST integration works in an API client but fails from the target instance with a 401 response.
  2. A partner retries the same payment-status webhook and each retry currently creates another approval record.
  3. A scoped order app must retrieve shipment tracking data from an authenticated external HTTP API.
  4. A vendor needs an authorized HTTP endpoint to submit status callbacks into a scoped ServiceNow application.

Explanation

Correct Answer

D:

This business need directly motivates Implement a properly authenticated Scripted REST API with validated inputs and ACL-aware writes; A Scripted REST resource can expose controlled server behavior to authorized external clients.

Incorrect Answers

A:

The described situation is better addressed by Inspect the request method, URL, authentication configuration and REST execution logs. End-to-end diagnostics distinguish authentication failures from schema or mapping errors.

B:

The described situation is better addressed by Use a stable external event ID and a tested idempotent create-or-update strategy. Duplicate delivery should not create duplicate business side effects.

C:

The described situation is better addressed by Configure an outbound REST Message or supported REST action with the correct method and endpoint. Outbound REST integration exchanges data with an external service over HTTP.

Question 533

A REST integration works in an API client but fails from the target instance with a 401 response. Which application design or configuration action best addresses this requirement on the ServiceNow platform?

  1. Use a stable external event ID and a tested idempotent create-or-update strategy
  2. Inspect the request method, URL, authentication configuration and REST execution logs
  3. Configure an outbound REST Message or supported REST action with the correct method and endpoint
  4. Use approved connection, credential or authentication management for the REST integration

Explanation

Correct Answer

B:

Correct for REST debugging evidence: End-to-end diagnostics distinguish authentication failures from schema or mapping errors.

Incorrect Answers

A:

That action instead addresses Idempotent external callbacks. Duplicate delivery should not create duplicate business side effects. It does not directly fulfill the stated REST debugging evidence requirement.

C:

That action instead addresses Outbound REST Message. Outbound REST integration exchanges data with an external service over HTTP. It does not directly fulfill the stated REST debugging evidence requirement.

D:

That action instead addresses REST authentication secret. Managed credentials avoid embedding reusable secrets in source-controlled application files. It does not directly fulfill the stated REST debugging evidence requirement.

Question 534

A developer applies this approach: Inspect the request method, URL, authentication configuration and REST execution logs. What platform behavior or outcome should be expected for the stated design?

  1. Duplicate delivery should not create duplicate business side effects.
  2. Outbound REST integration exchanges data with an external service over HTTP.
  3. End-to-end diagnostics distinguish authentication failures from schema or mapping errors.
  4. Managed credentials avoid embedding reusable secrets in source-controlled application files.

Explanation

Correct Answer

C:

The expected result for REST debugging evidence is: End-to-end diagnostics distinguish authentication failures from schema or mapping errors.

Incorrect Answers

A:

This describes Idempotent external callbacks and its associated action, Use a stable external event ID and a tested idempotent create-or-update strategy, rather than the consequence of the stated approach.

B:

This describes Outbound REST Message and its associated action, Configure an outbound REST Message or supported REST action with the correct method and endpoint, rather than the consequence of the stated approach.

D:

This describes REST authentication secret and its associated action, Use approved connection, credential or authentication management for the REST integration, rather than the consequence of the stated approach.

Question 535

A REST integration works in an API client but fails from the target instance with a 401 response. A teammate suggests a different change: Use a stable external event ID and a tested idempotent create-or-update strategy. That change does not resolve the actual requirement. Which correction is most appropriate?

  1. Use a stable external event ID and a tested idempotent create-or-update strategy
  2. Configure an outbound REST Message or supported REST action with the correct method and endpoint
  3. Use approved connection, credential or authentication management for the REST integration
  4. Inspect the request method, URL, authentication configuration and REST execution logs

Explanation

Correct Answer

D:

Use the indicated corrective approach. End-to-end diagnostics distinguish authentication failures from schema or mapping errors. This meets the specific requirement for REST debugging evidence.

Incorrect Answers

A:

Not the appropriate correction: Use a stable external event ID and a tested idempotent create-or-update strategy is relevant to Idempotent external callbacks. Duplicate delivery should not create duplicate business side effects.

B:

Not the appropriate correction: Configure an outbound REST Message or supported REST action with the correct method and endpoint is relevant to Outbound REST Message. Outbound REST integration exchanges data with an external service over HTTP.

C:

Not the appropriate correction: Use approved connection, credential or authentication management for the REST integration is relevant to REST authentication secret. Managed credentials avoid embedding reusable secrets in source-controlled application files.

Question 536

A developer proposes this approach: Inspect the request method, URL, authentication configuration and REST execution logs. Which business requirement is the strongest reason to choose it?

  1. A REST integration works in an API client but fails from the target instance with a 401 response.
  2. A partner retries the same payment-status webhook and each retry currently creates another approval record.
  3. A scoped order app must retrieve shipment tracking data from an authenticated external HTTP API.
  4. An external supplier API needs an OAuth token and developers plan to paste it into script source.

Explanation

Correct Answer

A:

This business need directly motivates Inspect the request method, URL, authentication configuration and REST execution logs; End-to-end diagnostics distinguish authentication failures from schema or mapping errors.

Incorrect Answers

B:

The described situation is better addressed by Use a stable external event ID and a tested idempotent create-or-update strategy. Duplicate delivery should not create duplicate business side effects.

C:

The described situation is better addressed by Configure an outbound REST Message or supported REST action with the correct method and endpoint. Outbound REST integration exchanges data with an external service over HTTP.

D:

The described situation is better addressed by Use approved connection, credential or authentication management for the REST integration. Managed credentials avoid embedding reusable secrets in source-controlled application files.

Question 537

A partner retries the same payment-status webhook and each retry currently creates another approval record. Which application design or configuration action best addresses this requirement on the ServiceNow platform?

  1. Configure an outbound REST Message or supported REST action with the correct method and endpoint
  2. Use approved connection, credential or authentication management for the REST integration
  3. Use a stable external event ID and a tested idempotent create-or-update strategy
  4. Check response status and handle retryable errors with bounded backoff before persisting success

Explanation

Correct Answer

C:

Correct for Idempotent external callbacks: Duplicate delivery should not create duplicate business side effects.

Incorrect Answers

A:

That action instead addresses Outbound REST Message. Outbound REST integration exchanges data with an external service over HTTP. It does not directly fulfill the stated Idempotent external callbacks requirement.

B:

That action instead addresses REST authentication secret. Managed credentials avoid embedding reusable secrets in source-controlled application files. It does not directly fulfill the stated Idempotent external callbacks requirement.

D:

That action instead addresses REST response status handling. Transport-level failures should not be treated as confirmed business outcomes. It does not directly fulfill the stated Idempotent external callbacks requirement.

Question 538

A developer applies this approach: Use a stable external event ID and a tested idempotent create-or-update strategy. What platform behavior or outcome should be expected for the stated design?

  1. Outbound REST integration exchanges data with an external service over HTTP.
  2. Managed credentials avoid embedding reusable secrets in source-controlled application files.
  3. Transport-level failures should not be treated as confirmed business outcomes.
  4. Duplicate delivery should not create duplicate business side effects.

Explanation

Correct Answer

D:

The expected result for Idempotent external callbacks is: Duplicate delivery should not create duplicate business side effects.

Incorrect Answers

A:

This describes Outbound REST Message and its associated action, Configure an outbound REST Message or supported REST action with the correct method and endpoint, rather than the consequence of the stated approach.

B:

This describes REST authentication secret and its associated action, Use approved connection, credential or authentication management for the REST integration, rather than the consequence of the stated approach.

C:

This describes REST response status handling and its associated action, Check response status and handle retryable errors with bounded backoff before persisting success, rather than the consequence of the stated approach.

Question 539

A partner retries the same payment-status webhook and each retry currently creates another approval record. A teammate suggests a different change: Configure an outbound REST Message or supported REST action with the correct method and endpoint. That change does not resolve the actual requirement. Which correction is most appropriate?

  1. Use a stable external event ID and a tested idempotent create-or-update strategy
  2. Configure an outbound REST Message or supported REST action with the correct method and endpoint
  3. Use approved connection, credential or authentication management for the REST integration
  4. Check response status and handle retryable errors with bounded backoff before persisting success

Explanation

Correct Answer

A:

Use the indicated corrective approach. Duplicate delivery should not create duplicate business side effects. This meets the specific requirement for Idempotent external callbacks.

Incorrect Answers

B:

Not the appropriate correction: Configure an outbound REST Message or supported REST action with the correct method and endpoint is relevant to Outbound REST Message. Outbound REST integration exchanges data with an external service over HTTP.

C:

Not the appropriate correction: Use approved connection, credential or authentication management for the REST integration is relevant to REST authentication secret. Managed credentials avoid embedding reusable secrets in source-controlled application files.

D:

Not the appropriate correction: Check response status and handle retryable errors with bounded backoff before persisting success is relevant to REST response status handling. Transport-level failures should not be treated as confirmed business outcomes.

Question 540

A developer proposes this approach: Use a stable external event ID and a tested idempotent create-or-update strategy. Which business requirement is the strongest reason to choose it?

  1. A scoped order app must retrieve shipment tracking data from an authenticated external HTTP API.
  2. A partner retries the same payment-status webhook and each retry currently creates another approval record.
  3. An external supplier API needs an OAuth token and developers plan to paste it into script source.
  4. An outbound request returns HTTP 429 and the app currently records the shipment as delivered.

Explanation

Correct Answer

B:

This business need directly motivates Use a stable external event ID and a tested idempotent create-or-update strategy; Duplicate delivery should not create duplicate business side effects.

Incorrect Answers

A:

The described situation is better addressed by Configure an outbound REST Message or supported REST action with the correct method and endpoint. Outbound REST integration exchanges data with an external service over HTTP.

C:

The described situation is better addressed by Use approved connection, credential or authentication management for the REST integration. Managed credentials avoid embedding reusable secrets in source-controlled application files.

D:

The described situation is better addressed by Check response status and handle retryable errors with bounded backoff before persisting success. Transport-level failures should not be treated as confirmed business outcomes.