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ISC CISSP Practice Test 83

Question 820

A development team ships weekly releases, but no process revisits threats when authentication flows change. A designer proposes: Treat the initial launch threat model as permanently correct regardless of later features. What is the MOST significant security deficiency in this proposal?

  1. Maturity investment should target measurable secure development weaknesses.
  2. Changed dependencies invalidate assumptions in the original assessment.
  3. Tool inventory does not show whether engineers manage threats, defects and releases effectively.
  4. An external identity dependency changes both attack surface and governance.

Explanation

Correct Answer

B:

Changed dependencies invalidate assumptions in the original assessment. This is the direct weakness in the proposed action.

Incorrect Answers

A:

This is an advantage of another design (Assess current secure-development practices and prioritize improvements based on risk and capability gaps.), not the particular flaw of Treat the initial launch threat model as permanently correct regardless of later features.

C:

This is a limitation elsewhere: A start-up wants a practical maturity plan for security engineering rather than immediate purchase of all tools. It does not explain the deficiency of the specified proposed approach.

D:

This explains a later shift in requirements (The team adopts a third-party SSO platform to replace internal login.), not the failure of the current proposal.

Question 821

A development team ships weekly releases, but no process revisits threats when authentication flows change. The organization has now implemented this response: Add risk-triggered threat modeling and security regression tests to the change workflow. Which observation would MOST directly demonstrate that the security objective was met?

  1. An approved change ticket for Add risk-triggered threat modeling and security regression tests to the change workflow. without a completed verification result.
  2. Every material identity change references updated threats and automated negative tests.
  3. Reproducible or attested build records link source revision and signed deployment digest.
  4. Tracked improvements show higher control coverage and lower serious escaped flaws.

Explanation

Correct Answer

B:

Every material identity change references updated threats and automated negative tests. This validates that threat models must evolve as trust paths and authentication behavior change.

Incorrect Answers

A:

An approved change without an executed test cannot prove operating effectiveness. The needed evidence is Every material identity change references updated threats and automated negative tests.

C:

This demonstrates controls in another circumstance: A team merges application code but fails to track which reviewed source revision produced a production executable.

D:

This other observation is relevant to: A start-up wants a practical maturity plan for security engineering rather than immediate purchase of all tools.

Question 822

A previous security situation was: A development team ships weekly releases, but no process revisits threats when authentication flows change. Now the requirement changes: The team adopts a third-party SSO platform to replace internal login. Which NEW action BEST answers the changed need?

  1. Every material identity change references updated threats and automated negative tests.
  2. Evaluate federation trust and supplier assurance before migrating identities.
  3. Add risk-triggered threat modeling and security regression tests to the change workflow.
  4. Treat the initial launch threat model as permanently correct regardless of later features.

Explanation

Correct Answer

B:

An external identity dependency changes both attack surface and governance. The revised action is Evaluate federation trust and supplier assurance before migrating identities.

Incorrect Answers

A:

This is a record of how the initial safeguard would be checked, not an action implementing the newly requested condition: Every material identity change references updated threats and automated negative tests.

C:

This is the appropriate response to the original situation: Threat models must evolve as trust paths and authentication behavior change. It does not directly meet the new condition.

D:

This remains inappropriate: Changed dependencies invalidate assumptions in the original assessment.

Question 823

A start-up wants a practical maturity plan for security engineering rather than immediate purchase of all tools. What should the security manager recommend as the MOST appropriate response to the current requirement?

  1. Assess current secure-development practices and prioritize improvements based on risk and capability gaps.
  2. Measure security solely by the number of products bought each quarter.
  3. Add required assurance and release authorization gates to the SDLC roadmap.
  4. Add risk-triggered threat modeling and security regression tests to the change workflow.

Explanation

Correct Answer

A:

Maturity investment should target measurable secure development weaknesses. This directly addresses the stated situation.

Incorrect Answers

B:

Tool inventory does not show whether engineers manage threats, defects and releases effectively.

C:

This is appropriate for a later condition (A regulator now requires documented independent security testing before release.), but it does not directly resolve the initial need. Compliance obligations change necessary evidence and independence in development.

D:

This response addresses a different condition: A development team ships weekly releases, but no process revisits threats when authentication flows change. The present case requires the measure described by Assess current secure-development practices and prioritize improvements based on risk and capability gaps.

Question 824

A start-up wants a practical maturity plan for security engineering rather than immediate purchase of all tools. A designer proposes: Measure security solely by the number of products bought each quarter. What is the MOST significant security deficiency in this proposal?

  1. Tool inventory does not show whether engineers manage threats, defects and releases effectively.
  2. Names and timestamps do not authenticate code origin or protect against substitution.
  3. Compliance obligations change necessary evidence and independence in development.
  4. Release integrity requires a verifiable linkage from change review to production software.

Explanation

Correct Answer

A:

Tool inventory does not show whether engineers manage threats, defects and releases effectively.

Incorrect Answers

B:

This is a limitation elsewhere: A team merges application code but fails to track which reviewed source revision produced a production executable. It does not explain the deficiency of the specified proposed approach.

C:

This explains a later shift in requirements (A regulator now requires documented independent security testing before release.), not the failure of the current proposal.

D:

This is an advantage of another design (Establish traceable builds connecting approved source, builder and deployed artifact digests.), not the particular flaw of Measure security solely by the number of products bought each quarter.

Question 825

A start-up wants a practical maturity plan for security engineering rather than immediate purchase of all tools. The team must implement a defensible safeguard AND demonstrate that it works. Which TWO entries form that control-and-evidence pair? (Select TWO.)

  1. Tracked improvements show higher control coverage and lower serious escaped flaws.
  2. Measure security solely by the number of products bought each quarter.
  3. Add required assurance and release authorization gates to the SDLC roadmap.
  4. Include key revocation, endpoint closure and data disposition in the retirement phase of SDLC.
  5. Assess current secure-development practices and prioritize improvements based on risk and capability gaps.

Explanation

Correct Answers

A:

Correct verification. The specific evidence is: Tracked improvements show higher control coverage and lower serious escaped flaws.

E:

Correct control. Maturity investment should target measurable secure development weaknesses.

Incorrect Answers

B:

Tool inventory does not show whether engineers manage threats, defects and releases effectively.

C:

This concerns a later and different need: A regulator now requires documented independent security testing before release. Compliance obligations change necessary evidence and independence in development.

D:

The proposed control fits another scenario: A product team retires an old mobile app but its API keys and customer data cache remain reachable for months. It does not directly address this scenario's primary requirement.

Question 826

A previous security situation was: A start-up wants a practical maturity plan for security engineering rather than immediate purchase of all tools. Now the requirement changes: A regulator now requires documented independent security testing before release. Which NEW action BEST answers the changed need?

  1. Add required assurance and release authorization gates to the SDLC roadmap.
  2. Assess current secure-development practices and prioritize improvements based on risk and capability gaps.
  3. Measure security solely by the number of products bought each quarter.
  4. Tracked improvements show higher control coverage and lower serious escaped flaws.

Explanation

Correct Answer

A:

Compliance obligations change necessary evidence and independence in development. The revised action is Add required assurance and release authorization gates to the SDLC roadmap.

Incorrect Answers

B:

This is the appropriate response to the original situation: Maturity investment should target measurable secure development weaknesses. It does not directly meet the new condition.

C:

This remains inappropriate: Tool inventory does not show whether engineers manage threats, defects and releases effectively.

D:

This is a record of how the initial safeguard would be checked, not an action implementing the newly requested condition: Tracked improvements show higher control coverage and lower serious escaped flaws.

Question 827

A team merges application code but fails to track which reviewed source revision produced a production executable. What should the security manager recommend as the MOST appropriate response to the current requirement?

  1. Trust an unsigned executable filename and deployment timestamp as sufficient provenance.
  2. Map the dependency to affected builds and prioritize coordinated patched releases.
  3. Assess current secure-development practices and prioritize improvements based on risk and capability gaps.
  4. Establish traceable builds connecting approved source, builder and deployed artifact digests.

Explanation

Correct Answer

D:

Release integrity requires a verifiable linkage from change review to production software. This directly addresses the stated situation.

Incorrect Answers

A:

Names and timestamps do not authenticate code origin or protect against substitution. The proposal would not be defensible for this case.

B:

This is appropriate for a later condition (A critical vulnerability emerges in a build dependency after release.), but it does not directly resolve the initial need. Post-release component exposure needs traceability and remediation in addition to provenance.

C:

This response addresses a different condition: A start-up wants a practical maturity plan for security engineering rather than immediate purchase of all tools. The present case requires the measure described by Establish traceable builds connecting approved source, builder and deployed artifact digests.

Question 828

A team merges application code but fails to track which reviewed source revision produced a production executable. A designer proposes: Trust an unsigned executable filename and deployment timestamp as sufficient provenance. What is the MOST significant security deficiency in this proposal?

  1. Retired client binaries can still expose credentials and functioning APIs.
  2. Post-release component exposure needs traceability and remediation in addition to provenance.
  3. Lifecycle security extends beyond initial deployment into shutdown and archival.
  4. Names and timestamps do not authenticate code origin or protect against substitution.

Explanation

Correct Answer

D:

Names and timestamps do not authenticate code origin or protect against substitution. This is the direct weakness in the proposed action.

Incorrect Answers

A:

This is a limitation elsewhere: A product team retires an old mobile app but its API keys and customer data cache remain reachable for months. It does not explain the deficiency of the specified proposed approach.

B:

This explains a later shift in requirements (A critical vulnerability emerges in a build dependency after release.), not the failure of the current proposal.

C:

This is an advantage of another design (Include key revocation, endpoint closure and data disposition in the retirement phase of SDLC.), not the particular flaw of Trust an unsigned executable filename and deployment timestamp as sufficient provenance.

Question 829

A team merges application code but fails to track which reviewed source revision produced a production executable. The organization has now implemented this response: Establish traceable builds connecting approved source, builder and deployed artifact digests. Which observation would MOST directly demonstrate that the security objective was met?

  1. Story acceptance records map threats to implemented access tests and design owners.
  2. Decommission tests show old client tokens denied and data retained only under approved policy.
  3. An approved change ticket for Establish traceable builds connecting approved source, builder and deployed artifact digests. without a completed verification result.
  4. Reproducible or attested build records link source revision and signed deployment digest.

Explanation

Correct Answer

D:

Reproducible or attested build records link source revision and signed deployment digest. This validates that release integrity requires a verifiable linkage from change review to production software.

Incorrect Answers

A:

This demonstrates controls in another circumstance: A product owner adds financial transaction features without security acceptance criteria or a threat model.

B:

This other observation is relevant to: A product team retires an old mobile app but its API keys and customer data cache remain reachable for months.

C:

An approved change without an executed test cannot prove operating effectiveness. The needed evidence is Reproducible or attested build records link source revision and signed deployment digest.

Question 830

A previous security situation was: A team merges application code but fails to track which reviewed source revision produced a production executable. Now the requirement changes: A critical vulnerability emerges in a build dependency after release. Which NEW action BEST answers the changed need?

  1. Establish traceable builds connecting approved source, builder and deployed artifact digests.
  2. Trust an unsigned executable filename and deployment timestamp as sufficient provenance.
  3. Reproducible or attested build records link source revision and signed deployment digest.
  4. Map the dependency to affected builds and prioritize coordinated patched releases.

Explanation

Correct Answer

D:

Post-release component exposure needs traceability and remediation in addition to provenance. The revised action is Map the dependency to affected builds and prioritize coordinated patched releases.

Incorrect Answers

A:

This is the appropriate response to the original situation: Release integrity requires a verifiable linkage from change review to production software. It does not directly meet the new condition.

B:

This remains inappropriate: Names and timestamps do not authenticate code origin or protect against substitution.

C:

This is a record of how the initial safeguard would be checked, not an action implementing the newly requested condition: Reproducible or attested build records link source revision and signed deployment digest.

Certified Information Systems Security Professional (CISSP) Practice Tests