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CompTIA CS0-003 Practice Test 94

Question 930

The SOC suppresses 90% of alerts and declares detection maturity improved without missed-case review. What is the MOST appropriate analyst action based on the evidence?

  1. Compare source duplicates, true-positive yield and new telemetry coverage.
  2. Measure false negatives and true-positive yield against known incidents.
  3. Normalize volume by monitored population and source fidelity before comparison.
  4. Record authorized exercise context without deleting the detection evidence.

Explanation

Correct Answer

B:

Low volume alone may indicate harmful detection suppression. Verify detection quality after alert suppression.

Incorrect Answers

A:

More alerts can reflect ingestion change rather than attacker activity. That is relevant to alert volume and false positives, not to verify detection quality after alert suppression.

C:

Different observation scope makes raw counts misleading. It could help normalize SOC alert volume across teams, but it would not verify detection quality after alert suppression.

D:

Legitimate test alerts can demonstrate successful control coverage. That is relevant to alert volume and false positives, not to verify detection quality after alert suppression.

Question 931

An incident was detected at 10:00 and contained at 10:12, but the case was closed next day. Which next step is MOST defensible for the security team?

  1. Disclose population, severity distribution and exclusions for comparable metrics.
  2. Separate mean time to remediate from overall case administrative duration.
  3. Report response or containment time separately from administrative close time.
  4. Define MTTD from evidenced activity onset to confirmed detection and note coverage limits.

Explanation

Correct Answer

C:

Different milestones answer different operational performance questions. Distinguish containment latency from ticket closure.

Incorrect Answers

A:

Selection bias can distort performance trends. It would prevent cherry-picked incident response KPI, but it would not distinguish containment latency from ticket closure.

B:

Remediation effectiveness should not be hidden by paperwork timing. It could help report technical remediation time separately, but it would not distinguish containment latency from ticket closure.

D:

Start-point consistency is necessary for meaningful detection time. It would calculate meaningful MTTD with event onset, but it would not distinguish containment latency from ticket closure.

Question 932

A year-end report compares alerts per analyst without accounting for case severity or automation. Which action BEST aligns with sound security operations?

  1. Flag the metric as limited and assess better event-onset evidence.
  2. Track technical eradication and legal case closure as separate milestones.
  3. Measure completed containment from appropriate start, not API submission.
  4. Normalize workload by complexity and relevant operational scope.

Explanation

Correct Answer

D:

Raw counts can penalize analysts handling complex incidents. Interpret workload metrics fairly.

Incorrect Answers

A:

Detection-time metrics cannot be precise without a consistent true start. It could help qualify MTTD when onset unknown, but it would not interpret workload metrics fairly.

B:

Operational response time should not be conflated with administrative lifecycle. That is relevant to incident response metric definitions, not to interpret workload metrics fairly.

C:

Asynchronous action initiation is not achieved response outcome. It would report true automation containment completion time, but it would not interpret workload metrics fairly.

Question 933

A fraud incident may involve a criminal complaint but SOC analysts want to share evidence directly with an unknown contact. Which response BEST addresses the security problem described?

  1. Coordinate release through legal and authorized law-enforcement liaison.
  2. Seek legal review and apply appropriate request scope and preservation.
  3. Restrict allegations and seek authorized legal guidance on attribution.
  4. Provide verified integrity and chain-of-custody documentation before reliance.

Explanation

Correct Answer

A:

Evidence disclosure needs lawful authority and chain-of-custody control. Route incident evidence to law enforcement properly.

Incorrect Answers

B:

External requests should not automatically override privacy and proportionality controls. It would evaluate law-enforcement mailbox request scope, but it would not route incident evidence to law enforcement properly.

C:

Premature accusations risk unjustified harm and evidentiary distortion. It could help prevent premature incident suspect disclosure, but it would not route incident evidence to law enforcement properly.

D:

Evidence integrity underpins future investigative and legal use. That is relevant to law enforcement and evidence disclosures, not to route incident evidence to law enforcement properly.

Question 934

The lessons learned document recommends changing policies but omits implementation checkpoints. Which investigative or response action BEST fits the evidence?

  1. Coordinate updated legal retention rules and evidence-handling controls.
  2. Set owner, deadline, success measure and follow-up test for each action.
  3. Assess systemic process and control factors in a blameless evidence-led review.
  4. Redact or aggregate sensitive details for the approved external audience.

Explanation

Correct Answer

B:

Improvements require accountable execution and verification. Make postmortem recommendations measurable.

Incorrect Answers

A:

Postincident governance findings can outlast initial technical closure. It would address new evidence retention obligation after incident, but it would not make postmortem recommendations measurable.

C:

Individualized blame obscures defects that can cause repeat incidents. That is relevant to incident postmortem communication maturity, not to make postmortem recommendations measurable.

D:

Useful lessons can be shared without exposing affected individuals. It would sanitize external postincident lessons report, but it would not make postmortem recommendations measurable.

Question 935

A senior leader requests a public statement naming the attacker based solely on one suspicious IP. What is the MOST appropriate analyst action based on the evidence?

  1. Lead with confirmed business impact, affected services, containment status and decisions needed.
  2. Add an evidence-backed timeline with major decisions and residual gaps.
  3. Advise against attribution until independent evidence supports a defensible claim.
  4. State confirmed exposure and unresolved exfiltration investigation separately.

Explanation

Correct Answer

C:

IP infrastructure location does not identify a perpetrator. Prevent unsupported actor attribution in executive statement.

Incorrect Answers

A:

Executives need an actionable summary rather than raw telemetry. It could help deliver business-focused incident executive summary, but it would not prevent unsupported actor attribution in executive statement.

B:

Incident progression allows leaders to evaluate response effectiveness. That is relevant to executive incident briefing, not to prevent unsupported actor attribution in executive statement.

D:

An accurate briefing distinguishes potential harm from verified data loss. It could help avoid overclaiming incident exfiltration to board, but it would not prevent unsupported actor attribution in executive statement.

Question 936

An incident report includes no timestamps for detection, containment or service recovery. Which next step is MOST defensible for the security team?

  1. Advise against attribution until independent evidence supports a defensible claim.
  2. Lead with confirmed business impact, affected services, containment status and decisions needed.
  3. State confirmed exposure and unresolved exfiltration investigation separately.
  4. Add an evidence-backed timeline with major decisions and residual gaps.

Explanation

Correct Answer

D:

Incident progression allows leaders to evaluate response effectiveness. Summarize incident timeline accurately.

Incorrect Answers

A:

IP infrastructure location does not identify a perpetrator. That is relevant to executive incident briefing, not to summarize incident timeline accurately.

B:

Executives need an actionable summary rather than raw telemetry. It would deliver business-focused incident executive summary, but it would not summarize incident timeline accurately.

C:

An accurate briefing distinguishes potential harm from verified data loss. It could help avoid overclaiming incident exfiltration to board, but it would not summarize incident timeline accurately.

Question 937

The team knows malicious data access happened but has no reliable evidence of attacker identity. Which action BEST aligns with sound security operations?

  1. Report confirmed access and explicitly withhold unverified actor attribution.
  2. Describe confirmed execution stage and observed effects only.
  3. Provide a qualitative supported confidence assessment with source and limitations.
  4. Explain attribution uncertainty and compare independent behavior indicators.

Explanation

Correct Answer

A:

Impact evidence and attribution confidence are separate questions. Separate attacker identity from access evidence.

Incorrect Answers

B:

Incident labels should not outrun forensic proof. It could help avoid unsupported ransomware impact claim, but it would not separate attacker identity from access evidence.

C:

Pseudoprecise confidence numbers are misleading without calibration. That is relevant to confidence and threat actor communication, not to separate attacker identity from access evidence.

D:

Shared cloud infrastructure does not uniquely link intrusions. It would communicate cloud shared-IP attribution limits, but it would not separate attacker identity from access evidence.

Question 938

Multiple related credential alerts reach different desks and no one owns the combined incident. Which response BEST addresses the security problem described?

  1. Escalate per major-incident criteria and alert response leadership immediately.
  2. Correlate the cases and assign an accountable incident manager.
  3. Escalate to approved legal and privacy authority and correct the missing decision routing.
  4. Apply severity criteria based on confirmed exposure and potential impact.

Explanation

Correct Answer

B:

Coordinated ownership prevents fragmented containment. Consolidate linked identity incidents under commander.

Incorrect Answers

A:

Active business impact justifies coordinated urgent incident command. It could help declare major incident for active ransomware, but it would not consolidate linked identity incidents under commander.

C:

Statutory triggers require accountable reporting workflows. It would route incident statutory escalation, but it would not consolidate linked identity incidents under commander.

D:

Prevention events should not automatically consume major-incident resources. It could help avoid overescalating blocked phish, but it would not consolidate linked identity incidents under commander.

Question 939

An external investigator receives a copied disk image without hashes or custody notes. Which investigative or response action BEST fits the evidence?

  1. Restrict allegations and seek authorized legal guidance on attribution.
  2. Seek legal review and apply appropriate request scope and preservation.
  3. Provide verified integrity and chain-of-custody documentation before reliance.
  4. Coordinate release through legal and authorized law-enforcement liaison.

Explanation

Correct Answer

C:

Evidence integrity underpins future investigative and legal use. Validate forensic transfer to investigator.

Incorrect Answers

A:

Premature accusations risk unjustified harm and evidentiary distortion. That is relevant to law enforcement and evidence disclosures, not to validate forensic transfer to investigator.

B:

External requests should not automatically override privacy and proportionality controls. It would evaluate law-enforcement mailbox request scope, but it would not validate forensic transfer to investigator.

D:

Evidence disclosure needs lawful authority and chain-of-custody control. That is relevant to law enforcement and evidence disclosures, not to validate forensic transfer to investigator.

Question 940

A quarterly report claims response is faster because detections occur later in attackers' campaigns. What is the MOST appropriate analyst action based on the evidence?

  1. Report evidence limitations rather than definitive absence of theft.
  2. Track recurrence and residual identity risk in postincident reporting.
  3. Define and test detection or response outcomes for each investment.
  4. Compare activity onset, detection and containment milestones consistently.

Explanation

Correct Answer

D:

Late detection can make apparent post-alert response look fast while impact grows. Detect misleading response metric improvement.

Incorrect Answers

A:

Missing historical logs cannot support confident no-exfiltration claims. It would disclose incident data loss visibility limits, but it would not detect misleading response metric improvement.

B:

One-dimensional closure metrics hide persistent systemic weakness. It could help report recurring incident root weakness, but it would not detect misleading response metric improvement.

C:

Spending activity is not evidence of better security. That is relevant to postincident metrics and review governance, not to detect misleading response metric improvement.


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