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CompTIA CS0-003 Practice Test 80

Question 790

An organization tests disaster recovery only for single-server failures, not identity outage. What is the MOST appropriate analyst action based on the evidence?

  1. Use dependency-based recovery order informed by business impact analysis.
  2. Add systemic outage scenarios that affect shared authentication and network dependencies.
  3. Rank recovery using business impact, safety and maximum tolerable downtime.
  4. Rotate secret material as part of validated clean restoration.

Explanation

Correct Answer

B:

Single-host tests may miss common-mode failures. Exercise systemic recovery failure modes.

Incorrect Answers

A:

Recovered frontends cannot function without critical upstream services. It would sequence recovery according to dependencies, but it would not exercise systemic recovery failure modes.

C:

Risk-based prioritization protects essential services first. That is relevant to recovery dependency and prioritization, not to exercise systemic recovery failure modes.

D:

Backup restoration may reproduce credential compromise. It would eliminate secrets retained in recovery snapshot, but it would not exercise systemic recovery failure modes.

Question 791

An incident's estimated business impact doubles after the financial reconciliation closes. Which next step is MOST defensible for the security team?

  1. Measure verified recovery/eradication milestones rather than administrative closure.
  2. Define detection-time metrics across all eligible incidents consistently.
  3. Update the impact report with time-stamped revised estimates and evidence.
  4. Normalize scenario complexity and decision criteria before trend comparison.

Explanation

Correct Answer

C:

Incident impact assessment may evolve as downstream losses become known. Revise incident impact after later reconciliation.

Incorrect Answers

A:

Correct outcome measurement prevents premature success reporting. It could help align IR remediation KPI to validation, but it would not revise incident impact after later reconciliation.

B:

Selection bias can make process improvement look better than reality. That is relevant to after-action metric improvement, not to revise incident impact after later reconciliation.

D:

Exercise metrics require comparable conditions for meaningful conclusions. It could help calibrate tabletop performance comparison, but it would not revise incident impact after later reconciliation.

Question 792

A server is technically clean but its business owner has not accepted restored payment processing. Which action BEST aligns with sound security operations?

  1. Maintain controlled hold until critical integrity and access checks pass.
  2. Patch and harden the restored workload before reconnecting to production.
  3. Make security logging part of recovery acceptance conditions.
  4. Obtain business validation against agreed transactions and recovery criteria.

Explanation

Correct Answer

D:

A service can appear healthy while failing its intended business function. Require business owner recovery acceptance.

Incorrect Answers

A:

Fast availability without integrity can extend incident harm. That is relevant to coordination with business recovery, not to require business owner recovery acceptance.

B:

Recovery must not reinstate the exploit that caused the incident. It would secure recovered service before reconnect, but it would not require business owner recovery acceptance.

C:

Restored operations need ongoing detection capability. It could help enforce monitoring in disaster recovery acceptance, but it would not require business owner recovery acceptance.

Question 793

A communications officer drafts customer notices without understanding what indicators are confirmed. Which response BEST addresses the security problem described?

  1. Conduct joint evidence briefings and use an approved publication review process.
  2. Exercise legal, privacy and executive communication responsibilities together.
  3. Validate secure evidence intake and transfer during onboarding exercises.
  4. Provide hands-on exercises with safe simulator systems and escalation coaching.

Explanation

Correct Answer

A:

External accuracy depends on shared technical confidence boundaries. Train incident communications evidence handling.

Incorrect Answers

B:

Decision makers need role-specific preparation, not only SOC technical training. It could help train executive breach notification response, but it would not train incident communications evidence handling.

C:

Repository handling is part of forensic chain-of-custody readiness. That is relevant to training for incident roles, not to train incident communications evidence handling.

D:

Practiced actions reduce delays and errors during real containment. It would train endpoint containment before duty, but it would not train incident communications evidence handling.

Question 794

A backup restores successfully in testing but recovered customer records are two days old beyond the RPO. Which investigative or response action BEST fits the evidence?

  1. Include identity and authentication dependencies in the impact analysis.
  2. Improve backup frequency or replication to satisfy required data-loss tolerance.
  3. Include trusted network configuration and security-control recovery dependencies.
  4. Revise capability or recovery strategy to meet agreed recovery objectives.

Explanation

Correct Answer

B:

RPO governs acceptable data age, not simply service availability. Close unacceptable RPO data loss.

Incorrect Answers

A:

Services cannot recover if their external identity dependencies remain unavailable. It could help include IAM dependency in business continuity, but it would not close unacceptable RPO data loss.

C:

Recovered workloads should not return without necessary protective controls. It would restore security controls in disaster recovery, but it would not close unacceptable RPO data loss.

D:

Recovery-time promises must reflect demonstrated operational capability. It could help close RTO versus restore capability gap, but it would not close unacceptable RPO data loss.

Question 795

A cross-team exercise reveals the emergency contact roster contains several departed employees. What is the MOST appropriate analyst action based on the evidence?

  1. Rework the scenario to exercise containment, evidence, restoration and escalation trade-offs.
  2. Include identity, cloud, legal and business owners relevant to that scenario.
  3. Update ownership and test the corrected call tree before the next drill.
  4. Capture decision timestamps, handoffs and follow-up actions during the exercise.

Explanation

Correct Answer

C:

Exercises expose operational readiness failures needing verified correction. Repair stale tabletop contact roster.

Incorrect Answers

A:

A useful exercise tests decision points rather than one scripted outcome. That is relevant to tabletop exercise design, not to repair stale tabletop contact roster.

B:

Exercises should involve the functions needed for real containment. It would include proper stakeholders in cloud tabletop, but it would not repair stale tabletop contact roster.

D:

Observed exercise performance guides measurable process improvements. That is relevant to tabletop exercise design, not to repair stale tabletop contact roster.

Question 796

After a breach, responders disagree over what was approved because no action log exists. Which next step is MOST defensible for the security team?

  1. Assign a telemetry owner, deadline and verification criterion to the improvement.
  2. Address remediation governance and recurring technical debt across the program.
  3. Validate improvements through follow-up exercises and targeted technical tests.
  4. Add a central timestamped response decision log to the playbook.

Explanation

Correct Answer

D:

Incident decisions require traceable authorization and handoffs. Fix missing incident decision journal.

Incorrect Answers

A:

Lessons only reduce future risk when converted into accountable work. It would operationalize detection coverage lesson, but it would not fix missing incident decision journal.

B:

Pattern analysis reveals systemic causes across individual incident records. It could help eliminate recurring incident root vulnerability, but it would not fix missing incident decision journal.

C:

Written changes do not prove operational effectiveness. That is relevant to postincident lessons learned, not to fix missing incident decision journal.

Question 797

A retrospective identifies bad asset ownership data but no team is responsible for fixing the CMDB. Which action BEST aligns with sound security operations?

  1. Assign an inventory owner and measurable asset mapping correction task.
  2. Version, publish and retire obsolete playbook references with confirmation.
  3. Conduct a targeted exercise or control test showing the weakness is addressed.
  4. Plan log storage, retention and privacy impacts before implementation.

Explanation

Correct Answer

A:

Unowned lessons do not reduce future triage delays. Assign postincident CMDB improvement owner.

Incorrect Answers

B:

Responders must use a current authoritative procedure under stress. That is relevant to improvement ownership and documentation, not to assign postincident CMDB improvement owner.

C:

Training completion metrics alone do not prove performance change. It would verify lessons learned behavioral effectiveness, but it would not assign postincident CMDB improvement owner.

D:

Better observability requires sustainable and lawful data handling. It could help govern new logging after postincident review, but it would not assign postincident CMDB improvement owner.

Question 798

A response team finds a compromised disk image but has no record of its first custodian. Which response BEST addresses the security problem described?

  1. Validate available source copies and document integrity uncertainty before reliance.
  2. Reconstruct permissible chain-of-custody documentation and disclose gaps.
  3. Separate observed evidence from inference and list confidence or limitations.
  4. Apply documented retention and legal hold rules before authorized disposal.

Explanation

Correct Answer

B:

Missing custody details cannot be hidden by later hashes. Acknowledge missing evidence custody history.

Incorrect Answers

A:

Evidentiary conclusions depend on collection and transfer integrity. That is relevant to forensics and evidence after incidents, not to acknowledge missing evidence custody history.

C:

Honest provenance supports defensible technical and legal conclusions. It could help qualify uncertain postincident findings, but it would not acknowledge missing evidence custody history.

D:

Restoring systems does not necessarily end evidence preservation obligations. That is relevant to forensics and evidence after incidents, not to acknowledge missing evidence custody history.

Question 799

An RTO of four hours is promised but restoring backups takes seven hours in the latest drill. Which investigative or response action BEST fits the evidence?

  1. Include trusted network configuration and security-control recovery dependencies.
  2. Improve backup frequency or replication to satisfy required data-loss tolerance.
  3. Revise capability or recovery strategy to meet agreed recovery objectives.
  4. Include identity and authentication dependencies in the impact analysis.

Explanation

Correct Answer

C:

Recovery-time promises must reflect demonstrated operational capability. Close RTO versus restore capability gap.

Incorrect Answers

A:

Recovered workloads should not return without necessary protective controls. It would restore security controls in disaster recovery, but it would not close RTO versus restore capability gap.

B:

RPO governs acceptable data age, not simply service availability. It could help close unacceptable RPO data loss, but it would not close RTO versus restore capability gap.

D:

Services cannot recover if their external identity dependencies remain unavailable. It would include IAM dependency in business continuity, but it would not close RTO versus restore capability gap.

Question 800

A new on-call responder has never practiced compromised-service isolation procedures. What is the MOST appropriate analyst action based on the evidence?

  1. Exercise legal, privacy and executive communication responsibilities together.
  2. Conduct joint evidence briefings and use an approved publication review process.
  3. Validate secure evidence intake and transfer during onboarding exercises.
  4. Provide hands-on exercises with safe simulator systems and escalation coaching.

Explanation

Correct Answer

D:

Practiced actions reduce delays and errors during real containment. Train endpoint containment before duty.

Incorrect Answers

A:

Decision makers need role-specific preparation, not only SOC technical training. It could help train executive breach notification response, but it would not train endpoint containment before duty.

B:

External accuracy depends on shared technical confidence boundaries. That is relevant to training for incident roles, not to train endpoint containment before duty.

C:

Repository handling is part of forensic chain-of-custody readiness. It would train encrypted evidence repository procedure, but it would not train endpoint containment before duty.


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