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CAS-005 Premium File: 482 Questions & Answers

Last Update: Oct 24, 2026

CAS-005 Training Course: 180 Video Lectures

CAS-005 PDF Study Guide: 903 Pages

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CompTIA CAS-005 Practice Test 11

Question 100

Incident responders compare the infrastructure, capability, actor and victim relationships. Which action is MOST defensible given these facts?

  1. Map observed behavior to supported ATT&CK techniques only.
  2. Use a lifecycle model to expose detection gaps at later stages.
  3. Use CAPEC patterns to enumerate relevant abuse cases.
  4. Use the Diamond Model to structure those linked observations.

Explanation

Correct Answer

D:

The model organizes intrusion relationships, not a confidence-free actor attribution. The controlling fact is: Incident responders compare the infrastructure, capability, actor and victim relationships.

Incorrect Answers

A:

The reported condition calls for this action: Use the Diamond Model to structure those linked observations.

B:

The current facts call for this action: use the Diamond Model to structure those linked observations.

C:

Attack patterns organize recurring exploitation behaviors. The scenario does not present the alternate condition: a design team wants reusable examples of how attackers abuse password reset workflows. The proper immediate action is to use the Diamond Model to structure those linked observations.

Question 101

A retrieval assistant treats a sentence in an external document as an administrator command. Which control or decision MOST directly resolves the stated gap?

  1. Enforce separation of untrusted retrieval text from privileged instructions.
  2. Validate generated tool arguments against policy before execution.
  3. Constrain tool permissions and require approval for sensitive actions.
  4. Reduce secret-bearing prompts and test output disclosure controls.

Explanation

Correct Answer

A:

Document content must not gain control authority. The controlling fact is: A retrieval assistant treats a sentence in an external document as an administrator command.

Incorrect Answers

B:

The current facts call for this action: enforce separation of untrusted retrieval text from privileged instructions.

C:

Data-sourced instructions should not trigger exfiltration. The scenario does not present the alternate condition: an assistant summarizes vendor notes that contain an instruction to email secret keys. The proper immediate action is to enforce separation of untrusted retrieval text from privileged instructions.

D:

The reported condition calls for this action: Enforce separation of untrusted retrieval text from privileged instructions.

Question 102

A threat actor gains permission to modify a training data bucket. What is the appropriate security response for this scenario?

  1. Rate-limit and test for data reconstruction or inversion behavior.
  2. Protect training provenance, write approvals and integrity monitoring.
  3. Require signed provenance and dependency review before deployment.
  4. Remove unauthorized model export and enforce artifact access controls.

Explanation

Correct Answer

B:

Poisoned examples can change model behavior after training. The controlling fact is: A threat actor gains permission to modify a training data bucket.

Incorrect Answers

A:

Rate-limit and test for data reconstruction or inversion behavior would not protect training provenance, write approvals and integrity monitoring.

C:

Model pipelines have software supply-chain risks. The scenario does not present the alternate condition: a model provider distributes a new binary artifact with no signature or origin evidence. The proper immediate action is to protect training provenance, write approvals and integrity monitoring.

D:

Removing unauthorized model export and enforcing artifact access controls would not protect training provenance, write approvals and integrity monitoring.

Question 103

Employees paste customer medical histories into an unapproved public AI tool. What should the enterprise security architect or analyst do NEXT?

  1. Require tested controls, documented datasets and measurable governance evidence.
  2. Verify underlying sources before using generated claims as evidence.
  3. Restrict sensitive prompts and supply a governed private alternative.
  4. Require explainability, review and documented human appeal processes.

Explanation

Correct Answer

C:

Input disclosure may violate data obligations. The controlling fact is: Employees paste customer medical histories into an unapproved public AI tool.

Incorrect Answers

A:

Requiring tested controls, documented datasets and measurable governance evidence would not restrict sensitive prompts and supply a governed private alternative.

B:

The current facts call for this action: restrict sensitive prompts and supply a governed private alternative.

D:

Requiring explainability, review and documented human appeal processes would not restrict sensitive prompts and supply a governed private alternative.

Question 104

An AI assistant can approve production firewall exceptions without a human reviewer. Which action is MOST defensible given these facts?

  1. Apply bounded tool budgets and cancellation thresholds.
  2. Preserve DLP and exception governance independently of agent requests.
  3. Use least-privilege scopes and audited data access.
  4. Require policy-constrained approvals for high-impact changes.

Explanation

Correct Answer

D:

Excessive agency creates uncontrolled configuration risk. The controlling fact is: An AI assistant can approve production firewall exceptions without a human reviewer.

Incorrect Answers

A:

The reported condition calls for this action: Require policy-constrained approvals for high-impact changes.

B:

The current facts call for this action: require policy-constrained approvals for high-impact changes.

C:

AI identities still require resource-specific authorization. The scenario does not present the alternate condition: an agent's service identity has access to every customer record though it reads only order status. The proper immediate action is to require policy-constrained approvals for high-impact changes.

Question 105

A finance executive appears in a video call requesting a new urgent wire transfer. Which action is the BEST response to the security requirement?

  1. Confirm the instruction via a separate trusted authorization channel.
  2. Use protected transaction verification and behavioral reporting drills.
  3. Test fairness and error rates across languages before deployment.
  4. Use strong out-of-band identity proofing rather than voice familiarity.

Explanation

Correct Answer

A:

Convincing synthetic media does not replace payment controls. The controlling fact is: A finance executive appears in a video call requesting a new urgent wire transfer.

Incorrect Answers

B:

The current facts call for this action: confirm the instruction via a separate trusted authorization channel.

C:

Biased detection can impede legitimate service. The scenario does not present the alternate condition: a fraud model flags every translated message as malicious without contextual evidence. The proper immediate action is to confirm the instruction via a separate trusted authorization channel.

D:

The reported condition calls for this action: Confirm the instruction via a separate trusted authorization channel.

Question 106

An agent's service identity has access to every customer record though it reads only order status. Which action is MOST defensible given these facts?

  1. Apply bounded tool budgets and cancellation thresholds.
  2. Use least-privilege scopes and audited data access.
  3. Preserve DLP and exception governance independently of agent requests.
  4. Require policy-constrained approvals for high-impact changes.

Explanation

Correct Answer

B:

AI identities still require resource-specific authorization. The controlling fact is: An agent's service identity has access to every customer record though it reads only order status.

Incorrect Answers

A:

Applying bounded tool budgets and cancellation thresholds would not meet the need for least-privilege scopes and audited data access.

C:

Business convenience cannot override mandatory data controls. The scenario does not present the alternate condition: an employee asks a work agent to bypass DLP so it can complete a report faster. The proper immediate action is to use least-privilege scopes and audited data access.

D:

Requiring policy-constrained approvals for high-impact changes would not meet the need for least-privilege scopes and audited data access.

Question 107

Employees receive highly personalized phishing written in a leader's style. Which action is the BEST response to the security requirement?

  1. Confirm the instruction via a separate trusted authorization channel.
  2. Test fairness and error rates across languages before deployment.
  3. Use protected transaction verification and behavioral reporting drills.
  4. Use strong out-of-band identity proofing rather than voice familiarity.

Explanation

Correct Answer

C:

AI can scale persuasive social engineering. The controlling fact is: Employees receive highly personalized phishing written in a leader's style.

Incorrect Answers

A:

Confirming the instruction via a separate trusted authorization channel would not meet the need for protected transaction verification and behavioral reporting drills.

B:

The current facts call for this action: use protected transaction verification and behavioral reporting drills.

D:

Using strong out-of-band identity proofing rather than voice familiarity would not meet the need for protected transaction verification and behavioral reporting drills.

Question 108

A high-impact model denies applicants without any meaningful explanation or appeal route. Which control or decision MOST directly resolves the stated gap?

  1. Verify underlying sources before using generated claims as evidence.
  2. Require tested controls, documented datasets and measurable governance evidence.
  3. Restrict sensitive prompts and supply a governed private alternative.
  4. Require explainability, review and documented human appeal processes.

Explanation

Correct Answer

D:

Opaque automated outcomes can create fairness and regulatory risks. The controlling fact is: A high-impact model denies applicants without any meaningful explanation or appeal route.

Incorrect Answers

A:

The reported condition calls for this action: Require explainability, review and documented human appeal processes.

B:

The current facts call for this action: require explainability, review and documented human appeal processes.

C:

Input disclosure may violate data obligations. The scenario does not present the alternate condition: employees paste customer medical histories into an unapproved public AI tool. The proper immediate action is to require explainability, review and documented human appeal processes.

Question 109

A model provider distributes a new binary artifact with no signature or origin evidence. What is the appropriate security response for this scenario?

  1. Require signed provenance and dependency review before deployment.
  2. Remove unauthorized model export and enforce artifact access controls.
  3. Rate-limit and test for data reconstruction or inversion behavior.
  4. Protect training provenance, write approvals and integrity monitoring.

Explanation

Correct Answer

A:

Model pipelines have software supply-chain risks. The controlling fact is: A model provider distributes a new binary artifact with no signature or origin evidence.

Incorrect Answers

B:

The current facts call for this action: require signed provenance and dependency review before deployment.

C:

Model outputs can leak memorized sensitive information. The scenario does not present the alternate condition: repeated crafted queries appear to reconstruct confidential training records. The proper immediate action is to require signed provenance and dependency review before deployment.

D:

The reported condition calls for this action: Require signed provenance and dependency review before deployment.

Question 110

An assistant summarizes vendor notes that contain an instruction to email secret keys. What should the enterprise security architect or analyst do NEXT?

  1. Validate generated tool arguments against policy before execution.
  2. Constrain tool permissions and require approval for sensitive actions.
  3. Enforce separation of untrusted retrieval text from privileged instructions.
  4. Reduce secret-bearing prompts and test output disclosure controls.

Explanation

Correct Answer

B:

Data-sourced instructions should not trigger exfiltration. The controlling fact is: An assistant summarizes vendor notes that contain an instruction to email secret keys.

Incorrect Answers

A:

Validating generated tool arguments against policy would not address the need for constrain tool permissions and require approval for sensitive actions.

C:

Document content must not gain control authority. The scenario does not present the alternate condition: a retrieval assistant treats a sentence in an external document as an administrator command. The proper immediate action is to constrain tool permissions and require approval for sensitive actions.

D:

Reduce secret-bearing prompts and test output disclosure controls would not address the need for constrain tool permissions and require approval for sensitive actions.


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