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AZ-400 Premium File: 398 Questions & Answers

Last Update: Oct 03, 2026

AZ-400 Training Course: 27 Video Lectures

AZ-400 PDF Study Guide: 784 Pages

$79.99

AZ-400 Bundle gives you unlimited access to "AZ-400" files. However, this does not replace the need for a .vce exam simulator. To download your .vce exam simulator click here

Microsoft AZ-400 Practice Test 90

Question 890

After the team applies this response: Apply protected reviews and targeted automated tests to dependency-update PRs while prioritizing critical remediation. In the situation—An enterprise uses Dependabot pull requests but merges upgrades without running compatibility or regression tests. Which evidence BEST demonstrates the response is effective?

  1. Use the service connection identity to retrieve the expected secret and verify attempts on unrelated secrets fail.
  2. Verify staging role cannot access production resources and the build config contains no live secrets.
  3. Inspect federated trust claims, effective RBAC and deployment logs showing temporary credential use.
  4. Open a controlled dependency-update PR and verify required checks and approvals before merge.

Explanation

Correct Answer

D:

The governing engineering principle is: Security remediation can introduce behavioral regressions and must remain within governed change controls.

Incorrect Answers

A:

Key Vault authorization depends on the identity, vault access model and granted data operations. The appropriate comparison is: Open a controlled dependency-update PR and verify required checks and approvals before merge.

B:

Environment isolation includes credentials and data permissions as well as resource names. The relevant evidence instead is: Open a controlled dependency-update PR and verify required checks and approvals before merge.

C:

Automation credentials should use narrowly scoped non-personal identities and minimize long-lived secrets. The acceptance criterion here is: Open a controlled dependency-update PR and verify required checks and approvals before merge.

Question 891

Another group treats vulnerability remediation PRs as exempt from all code review and test requirements. Which engineering principle BEST explains the relevant requirement?

  1. Effective authorization is the union of relevant role and group grants, not simply the most recent membership edit.
  2. Environment isolation includes credentials and data permissions as well as resource names.
  3. Managed identity removes application-secret management when the target service supports Entra authentication.
  4. Security remediation can introduce behavioral regressions and must remain within governed change controls.

Explanation

Correct Answer

D:

The second engineering situation illustrates the control boundary captured by this principle: Security remediation can introduce behavioral regressions and must remain within governed change controls. The scenario is not resolved by an unrelated pipeline or policy activity.

Incorrect Answers

A:

Effective authorization is the union of relevant role and group grants, not simply the most recent membership edit. That principle concerns design and implement authentication and authorization methods, whereas this specific incident is governed by: Security remediation can introduce behavioral regressions and must remain within governed change controls.

B:

Environment isolation includes credentials and data permissions as well as resource names. That principle concerns design and implement a strategy for managing sensitive information in automation, whereas this specific incident is governed by: Security remediation can introduce behavioral regressions and must remain within governed change controls.

C:

Managed identity removes application-secret management when the target service supports Entra authentication. That principle concerns design and implement authentication and authorization methods, whereas this specific incident is governed by: Security remediation can introduce behavioral regressions and must remain within governed change controls.

Question 892

Another group treats vulnerability remediation PRs as exempt from all code review and test requirements. Which unsupported assumption should the engineer challenge FIRST?

  1. Knowing the name or URI of a Key Vault secret does not automatically grant access to its value.
  2. A dependency update being security-related does not guarantee it is functionally compatible.
  3. Deleting a sensitive variable at the end of a script does not remove copies already embedded in artifacts.
  4. A role name or single permission entry does not always describe the user's complete effective access.

Explanation

Correct Answer

B:

A dependency update being security-related does not guarantee it is functionally compatible. This is the relevant unsupported assumption because security remediation can introduce behavioral regressions and must remain within governed change controls.

Incorrect Answers

A:

This caution is valid in design and implement a strategy for managing sensitive information in automation, but it is not the failure assumption illustrated by this scenario. The directly relevant risk is: A dependency update being security-related does not guarantee it is functionally compatible.

C:

This caution is valid in design and implement a strategy for managing sensitive information in automation, but it is not the failure assumption illustrated by this scenario. The directly relevant risk is: A dependency update being security-related does not guarantee it is functionally compatible.

D:

This caution is valid in design and implement authentication and authorization methods, but it is not the failure assumption illustrated by this scenario. The directly relevant risk is: A dependency update being security-related does not guarantee it is functionally compatible.

Question 893

A GitHub Advanced Security alert is closed as fixed when code changes merge but the vulnerable artifact remains running in production. Which design or operational change MOST directly satisfies the requirement?

  1. Use secure files or Key Vault-backed certificate delivery with protected pipeline authorization and short-lived access.
  2. Use identity-bound Key Vault access and treat URIs as locators, with least-privilege data access.
  3. Link security fix commits to rebuilt immutable artifacts and verify replacement of deployed vulnerable versions.
  4. Prefer secure environment or controlled secret inputs and avoid command-line or log exposure for sensitive values.

Explanation

Correct Answer

C:

Vulnerability closure should include remediation delivery to affected environments, not just a source patch. The most directly responsive design or operational step is: Link security fix commits to rebuilt immutable artifacts and verify replacement of deployed vulnerable versions. Confirm the result by: Compare runtime image or package digests against remediated build inventory and original finding.

Incorrect Answers

A:

Sensitive deployment files require a security boundary distinct from ordinary source or artifact distribution. The appropriate remedy is to link security fix commits to rebuilt immutable artifacts and verify replacement of deployed vulnerable versions.

B:

Secret location and secret authorization are separate; a known vault URI is not a credential. Instead, the response must link security fix commits to rebuilt immutable artifacts and verify replacement of deployed vulnerable versions.

D:

Secret masking in pipeline logs is not a complete defense against process or file-based leakage. The relevant control is to link security fix commits to rebuilt immutable artifacts and verify replacement of deployed vulnerable versions.

Question 894

After the team applies this response: Link security fix commits to rebuilt immutable artifacts and verify replacement of deployed vulnerable versions. In the situation—A GitHub Advanced Security alert is closed as fixed when code changes merge but the vulnerable artifact remains running in production. Which evidence BEST demonstrates the response is effective?

  1. Attempt the relevant protected action and compare the result to the computed effective permission report.
  2. Compare runtime image or package digests against remediated build inventory and original finding.
  3. Review installation scope and attempt an unauthorized repository API call using the App token.
  4. Inspect identity bindings and test allowed and denied access for each application under its effective identity.

Explanation

Correct Answer

B:

The governing engineering principle is: Vulnerability closure should include remediation delivery to affected environments, not just a source patch.

Incorrect Answers

A:

Authorization must be evaluated as enforced behavior rather than guessed from role labels alone. The needed step here is to compare runtime image or package digests against remediated build inventory and original finding.

C:

Application integrations should receive only required repository access and authenticated event scope. The appropriate remedy is to compare runtime image or package digests against remediated build inventory and original finding.

D:

User-assigned identity reuse is a deliberate shared trust boundary, not merely a configuration convenience. Instead, the response must compare runtime image or package digests against remediated build inventory and original finding.

Question 895

Another organization tracks source-remediation completion without confirming rebuilt and deployed packages. Which engineering principle BEST explains the relevant requirement?

  1. Vulnerability closure should include remediation delivery to affected environments, not just a source patch.
  2. Automation should rely on purpose-scoped integration identities rather than personal credentials.
  3. Application integrations should receive only required repository access and authenticated event scope.
  4. Secret location and secret authorization are separate; a known vault URI is not a credential.

Explanation

Correct Answer

A:

The second engineering situation illustrates the control boundary captured by this principle: Vulnerability closure should include remediation delivery to affected environments, not just a source patch. The scenario is not resolved by an unrelated pipeline or policy activity.

Incorrect Answers

B:

The second engineering situation illustrates the control boundary captured by this principle: Automation should rely on purpose-scoped integration identities rather than personal credentials. What must be demonstrated is: Vulnerability closure should include remediation delivery to affected environments, not just a source patch.

C:

Application integrations should receive only required repository access and authenticated event scope. That principle concerns design and implement authentication and authorization methods, whereas this specific incident is governed by: Vulnerability closure should include remediation delivery to affected environments, not just a source patch.

D:

Secret location and secret authorization are separate; a known vault URI is not a credential. That principle concerns design and implement a strategy for managing sensitive information in automation, whereas this specific incident is governed by: Vulnerability closure should include remediation delivery to affected environments, not just a source patch.

Question 896

Another organization tracks source-remediation completion without confirming rebuilt and deployed packages. Which unsupported assumption should the engineer challenge FIRST?

  1. A role name or single permission entry does not always describe the user's complete effective access.
  2. Giving someone Stakeholder access does not inherently grant every repository and pipeline permission.
  3. Having Contributor access to a resource group does not necessarily permit reading every Key Vault secret.
  4. A PR closing an alert does not prove the vulnerable application binary has left production.

Explanation

Correct Answer

D:

A PR closing an alert does not prove the vulnerable application binary has left production. This is the relevant unsupported assumption because vulnerability closure should include remediation delivery to affected environments, not just a source patch.

Incorrect Answers

A:

This is the relevant unsupported assumption because authorization must be evaluated as enforced behavior rather than guessed from role labels alone. The appropriate comparison is: A PR closing an alert does not prove the vulnerable application binary has left production.

B:

This is the relevant unsupported assumption because azure DevOps access levels and security permissions govern different aspects of a user's effective capabilities. The relevant evidence instead is: A PR closing an alert does not prove the vulnerable application binary has left production.

C:

This is the relevant unsupported assumption because key Vault authorization depends on the identity, vault access model and granted data operations. The acceptance criterion here is: A PR closing an alert does not prove the vulnerable application binary has left production.

Question 897

A security workflow runs under repository-admin credentials and can disable its own scanning policy when a finding is severe. Which design or operational change MOST directly satisfies the requirement?

  1. Restrict GitHub App permissions and installations to necessary repositories and verify incoming webhook signatures.
  2. Separate security policy administration from application contribution and require independent review of scanner configuration changes.
  3. Enable an appropriate managed identity and grant it only the Key Vault data-plane permissions required by the workload.
  4. Reconcile effective user permissions across direct, group and inherited grants, then remove unnecessary paths.

Explanation

Correct Answer

B:

Security gates are trustworthy only when the subjects they control cannot silently disable them. The most directly responsive design or operational step is: Separate security policy administration from application contribution and require independent review of scanner configuration changes. Confirm the result by: Attempt to bypass the scanner through an ordinary code PR and verify protections reject the change.

Incorrect Answers

A:

Application integrations should receive only required repository access and authenticated event scope. The relevant control is to separate security policy administration from application contribution and require independent review of scanner configuration changes.

C:

Managed identity removes application-secret management when the target service supports Entra authentication. The needed step here is to separate security policy administration from application contribution and require independent review of scanner configuration changes.

D:

Effective authorization is the union of relevant role and group grants, not simply the most recent membership edit. The appropriate remedy is to separate security policy administration from application contribution and require independent review of scanner configuration changes.

Question 898

After the team applies this response: Separate security policy administration from application contribution and require independent review of scanner configuration changes. In the situation—A security workflow runs under repository-admin credentials and can disable its own scanning policy when a finding is severe. Which evidence BEST demonstrates the response is effective?

  1. Audit effective inherited permissions and test required contribution versus restricted policy editing.
  2. Attempt to bypass the scanner through an ordinary code PR and verify protections reject the change.
  3. Run a test workflow from an unapproved branch and verify Azure token exchange fails while approved release succeeds.
  4. Attempt the relevant protected action and compare the result to the computed effective permission report.

Explanation

Correct Answer

B:

The governing engineering principle is: Security gates are trustworthy only when the subjects they control cannot silently disable them.

Incorrect Answers

A:

Source management privileges should distinguish day-to-day contribution from changing the enforcement rules. What must be demonstrated is: Attempt to bypass the scanner through an ordinary code PR and verify protections reject the change.

C:

Federated identity security depends on sufficiently narrow claims linking external workflows to Azure roles. The appropriate comparison is: Attempt to bypass the scanner through an ordinary code PR and verify protections reject the change.

D:

Authorization must be evaluated as enforced behavior rather than guessed from role labels alone. The relevant evidence instead is: Attempt to bypass the scanner through an ordinary code PR and verify protections reject the change.

Question 899

Another project lets application developers edit both the security scanner policy and the protected release gate unreviewed. Which engineering principle BEST explains the relevant requirement?

  1. Secret availability should follow environment trust and job function, not global workflow visibility.
  2. Security gates are trustworthy only when the subjects they control cannot silently disable them.
  3. External collaboration should use the smallest repository and permission scope required for the role.
  4. Key Vault authorization depends on the identity, vault access model and granted data operations.

Explanation

Correct Answer

B:

The second engineering situation illustrates the control boundary captured by this principle: Security gates are trustworthy only when the subjects they control cannot silently disable them. The scenario is not resolved by an unrelated pipeline or policy activity.

Incorrect Answers

A:

Secret availability should follow environment trust and job function, not global workflow visibility. That principle concerns design and implement a strategy for managing sensitive information in automation, whereas this specific incident is governed by: Security gates are trustworthy only when the subjects they control cannot silently disable them.

C:

External collaboration should use the smallest repository and permission scope required for the role. That principle concerns design and implement authentication and authorization methods, whereas this specific incident is governed by: Security gates are trustworthy only when the subjects they control cannot silently disable them.

D:

Key Vault authorization depends on the identity, vault access model and granted data operations. That principle concerns design and implement a strategy for managing sensitive information in automation, whereas this specific incident is governed by: Security gates are trustworthy only when the subjects they control cannot silently disable them.

Question 900

Another project lets application developers edit both the security scanner policy and the protected release gate unreviewed. Which unsupported assumption should the engineer challenge FIRST?

  1. Deleting a sensitive variable at the end of a script does not remove copies already embedded in artifacts.
  2. Knowing the name or URI of a Key Vault secret does not automatically grant access to its value.
  3. Giving someone Stakeholder access does not inherently grant every repository and pipeline permission.
  4. A code-scanning job written in YAML is not a strong control if every contributor may remove the job.

Explanation

Correct Answer

D:

A code-scanning job written in YAML is not a strong control if every contributor may remove the job. This is the relevant unsupported assumption because security gates are trustworthy only when the subjects they control cannot silently disable them.

Incorrect Answers

A:

This caution is valid in design and implement a strategy for managing sensitive information in automation, but it is not the failure assumption illustrated by this scenario. The directly relevant risk is: A code-scanning job written in YAML is not a strong control if every contributor may remove the job.

B:

This caution is valid in design and implement a strategy for managing sensitive information in automation, but it is not the failure assumption illustrated by this scenario. The directly relevant risk is: A code-scanning job written in YAML is not a strong control if every contributor may remove the job.

C:

This caution is valid in design and implement authentication and authorization methods, but it is not the failure assumption illustrated by this scenario. The directly relevant risk is: A code-scanning job written in YAML is not a strong control if every contributor may remove the job.


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