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Isaca CISA Bundle

Exam Code: CISA

Exam Name Certified Information Systems Auditor

Certification Provider: Isaca

Corresponding Certification: CISA

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Isaca CISA Practice Test 78

Question 770

During a payment-platform modernization at a payment clearing organization, the IS auditor learns that certificate expiration causes repeated service outages with no renewal owner. The affected operation supports merchant settlement and reconciliation. Finance and settlement integrity depend on this operation. Which audit procedure would MOST directly validate the suspected control gap?

  1. Map the service responsibility model and inspect tenant configuration, identity, logging and third-party assurance scope.
  2. Trace injected or historical test events from source ingestion through detection rules, triage and escalation records.
  3. Examine certificate issuance, chain validation, revocation, expiry monitoring and key custody; test rejection conditions.
  4. Map realistic threats to entry points, trust boundaries and known weaknesses, then validate controls against representative misuse cases.

Explanation

Correct Answer

C:

Correct. Examine certificate issuance, chain validation, revocation, expiry monitoring and key custody; test rejection conditions. The procedure directly tests the reported condition that certificate expiration causes repeated service outages with no renewal owner. A defensible IS audit conclusion requires relevant and reliable evidence from the actual control population and period.

Incorrect Answers

A:

Not the most direct fieldwork procedure for these facts. It changes a different feature than evidence appropriate to the audit conclusion.

B:

Not the most direct fieldwork procedure for these facts. That change would not implement evidence appropriate to the audit conclusion.

D:

Not the most direct fieldwork procedure for these facts. The evidence appropriate to the audit conclusion prerequisite remains unaddressed.

Question 771

During a payment-platform modernization at a payment clearing organization, the IS auditor learns that certificate expiration causes repeated service outages with no renewal owner. The affected operation supports merchant settlement and reconciliation. Finance and settlement integrity depend on this operation. What would an auditor MOST want to see before accepting the issue as remediated?

  1. Certificate tests reject invalid or revoked identities and renewal records demonstrate reliable trusted service continuity.
  2. Controlled detections and case reviews show significant events are logged, prioritized and escalated within approved windows.
  3. Improved realistic reporting and safer decisions on repeated exercises demonstrate awareness effectiveness beyond completion rates.
  4. Tenant-isolation checks and responsibility-mapped evidence show both provider and customer controls work as assigned.

Explanation

Correct Answer

A:

Correct. Certificate tests reject invalid or revoked identities and renewal records demonstrate reliable trusted service continuity. This is stronger than a manager's verbal assurance because it can be checked against the observed issue that certificate expiration causes repeated service outages with no renewal owner. The reviewer must verify the remediation period and scope.

Incorrect Answers

B:

Not the strongest closure evidence for this case. The configuration must instead establish evidence appropriate to the audit conclusion.

C:

Not the strongest closure evidence for this case. The evidence appropriate to the audit conclusion prerequisite remains unaddressed.

D:

Not the strongest closure evidence for this case. It changes a different feature than evidence appropriate to the audit conclusion.

Question 772

During a regulatory readiness review at a municipal government, the IS auditor learns that a private CA signing key is shared among general administrators. The affected operation supports citizen service accounts and public records. Public accountability and essential service access are affected. What is the MOST defensible risk conclusion from the observed condition?

  1. Weak device identity, lifecycle and network segmentation can expose sensitive systems through unmanaged endpoints.
  2. Weak trust chain validation and certificate lifecycle controls can enable impersonation or availability loss.
  3. Uncoordinated response can worsen damage, jeopardize evidence or miss critical decision and communication obligations.
  4. Training attendance alone may not reduce unsafe behavior if role relevance and effectiveness are never assessed.

Explanation

Correct Answer

B:

Correct. Weak trust chain validation and certificate lifecycle controls can enable impersonation or availability loss. The described exception is: a private CA signing key is shared among general administrators. This risk ties the observation to the business significance of citizen service accounts and public records, rather than treating management's claim as independent assurance.

Incorrect Answers

A:

Weak device identity, lifecycle and network segmentation can expose sensitive systems through unmanaged endpoints. Recurrence here depends on evidence appropriate to the audit conclusion, not this safeguard.

C:

Uncoordinated response can worsen damage, jeopardize evidence or miss critical decision and communication obligations. It protects a different risk than the evidence appropriate to the audit conclusion requirement.

D:

Training attendance alone may not reduce unsafe behavior if role relevance and effectiveness are never assessed. It does not retain the evidence appropriate to the audit conclusion control over time.

Question 773

During a regulatory readiness review at a municipal government, the IS auditor learns that a private CA signing key is shared among general administrators. The affected operation supports citizen service accounts and public records. Public accountability and essential service access are affected. Which fieldwork step should the auditor prioritize to test the issue?

  1. Trace response exercises and incidents through roles, containment, communication, evidence preservation, recovery and lessons learned.
  2. Examine certificate issuance, chain validation, revocation, expiry monitoring and key custody; test rejection conditions.
  3. Map realistic threats to entry points, trust boundaries and known weaknesses, then validate controls against representative misuse cases.
  4. Inventory managed devices and test credential, encryption, isolation, patch and remote-wipe arrangements.

Explanation

Correct Answer

B:

Correct. Examine certificate issuance, chain validation, revocation, expiry monitoring and key custody; test rejection conditions. The procedure directly tests the reported condition that a private CA signing key is shared among general administrators. A defensible IS audit conclusion requires relevant and reliable evidence from the actual control population and period.

Incorrect Answers

A:

Not the most direct fieldwork procedure for these facts. The evidence appropriate to the audit conclusion prerequisite remains unaddressed.

C:

Not the most direct fieldwork procedure for these facts. That change would not implement evidence appropriate to the audit conclusion.

D:

Not the most direct fieldwork procedure for these facts. The configuration must instead establish evidence appropriate to the audit conclusion.

Question 774

During a regulatory readiness review at a municipal government, the IS auditor learns that a private CA signing key is shared among general administrators. The affected operation supports citizen service accounts and public records. Public accountability and essential service access are affected. Which observed evidence is MOST persuasive for a controlled audit follow-up?

  1. Improved realistic reporting and safer decisions on repeated exercises demonstrate awareness effectiveness beyond completion rates.
  2. Observed endpoint and wireless tests isolate untrusted devices, remove weak credentials and protect lost-device data.
  3. A rehearsed response record shows timely authorized containment, validated recovery and closure of assigned improvements.
  4. Certificate tests reject invalid or revoked identities and renewal records demonstrate reliable trusted service continuity.

Explanation

Correct Answer

D:

Correct. Certificate tests reject invalid or revoked identities and renewal records demonstrate reliable trusted service continuity. This is stronger than a manager's verbal assurance because it can be checked against the observed issue that a private CA signing key is shared among general administrators. The reviewer must verify the remediation period and scope.

Incorrect Answers

A:

Not the strongest closure evidence for this case. The relevant success criterion is evidence appropriate to the audit conclusion; this measures a different function.

B:

Not the strongest closure evidence for this case. That result could pass without demonstrating evidence appropriate to the audit conclusion.

C:

Not the strongest closure evidence for this case. Acceptance here depends on observing evidence appropriate to the audit conclusion, not only that test.

Question 775

During a post-incident audit at a retail marketplace, the IS auditor learns that revocation information is never checked for high-risk privileged connections. The affected operation supports customer checkout and order fulfillment. Customer transactions and market trust depend on effective control. Which risk statement is BEST supported by the recorded exception?

  1. Cloud outsourcing does not remove customer responsibility for configuration, access and oversight of shared-control boundaries.
  2. Training attendance alone may not reduce unsafe behavior if role relevance and effectiveness are never assessed.
  3. Weak trust chain validation and certificate lifecycle controls can enable impersonation or availability loss.
  4. Security testing can miss material exposure or create uncontrolled disruption if scope, validation and remediation are weak.

Explanation

Correct Answer

C:

Correct. Weak trust chain validation and certificate lifecycle controls can enable impersonation or availability loss. The described exception is: revocation information is never checked for high-risk privileged connections. This risk ties the observation to the business significance of customer checkout and order fulfillment, rather than treating management's claim as independent assurance.

Incorrect Answers

A:

Cloud outsourcing does not remove customer responsibility for configuration, access and oversight of shared-control boundaries. It does not retain the evidence appropriate to the audit conclusion control over time.

B:

Training attendance alone may not reduce unsafe behavior if role relevance and effectiveness are never assessed. Recurrence here depends on evidence appropriate to the audit conclusion, not this safeguard.

D:

Security testing can miss material exposure or create uncontrolled disruption if scope, validation and remediation are weak. It protects a different risk than the evidence appropriate to the audit conclusion requirement.

Question 776

During a post-incident audit at a retail marketplace, the IS auditor learns that revocation information is never checked for high-risk privileged connections. The affected operation supports customer checkout and order fulfillment. Customer transactions and market trust depend on effective control. During fieldwork, what is the BEST focused test of this condition?

  1. Map the service responsibility model and inspect tenant configuration, identity, logging and third-party assurance scope.
  2. Map realistic threats to entry points, trust boundaries and known weaknesses, then validate controls against representative misuse cases.
  3. Review test authorization, representative scope, evidence, independent verification and corrective retesting of significant findings.
  4. Examine certificate issuance, chain validation, revocation, expiry monitoring and key custody; test rejection conditions.

Explanation

Correct Answer

D:

Correct. Examine certificate issuance, chain validation, revocation, expiry monitoring and key custody; test rejection conditions. The procedure directly tests the reported condition that revocation information is never checked for high-risk privileged connections. A defensible IS audit conclusion requires relevant and reliable evidence from the actual control population and period.

Incorrect Answers

A:

Not the most direct fieldwork procedure for these facts. Recurrence here depends on evidence appropriate to the audit conclusion, not this safeguard.

B:

Not the most direct fieldwork procedure for these facts. That protection can exist while evidence appropriate to the audit conclusion is still missing.

C:

Not the most direct fieldwork procedure for these facts. It protects a different risk than the evidence appropriate to the audit conclusion requirement.

Question 777

During a post-incident audit at a retail marketplace, the IS auditor learns that revocation information is never checked for high-risk privileged connections. The affected operation supports customer checkout and order fulfillment. Customer transactions and market trust depend on effective control. Management states that remediation is complete. Which evidence BEST supports closing this issue?

  1. Certificate tests reject invalid or revoked identities and renewal records demonstrate reliable trusted service continuity.
  2. Improved realistic reporting and safer decisions on repeated exercises demonstrate awareness effectiveness beyond completion rates.
  3. Authorized test reports and targeted retests demonstrate critical exposures are identified, risk-rated and resolved.
  4. Tenant-isolation checks and responsibility-mapped evidence show both provider and customer controls work as assigned.

Explanation

Correct Answer

A:

Correct. Certificate tests reject invalid or revoked identities and renewal records demonstrate reliable trusted service continuity. This is stronger than a manager's verbal assurance because it can be checked against the observed issue that revocation information is never checked for high-risk privileged connections. The reviewer must verify the remediation period and scope.

Incorrect Answers

B:

Not the strongest closure evidence for this case. The relevant success criterion is evidence appropriate to the audit conclusion; this measures a different function.

C:

Not the strongest closure evidence for this case. That result could pass without demonstrating evidence appropriate to the audit conclusion.

D:

Not the strongest closure evidence for this case. Acceptance here depends on observing evidence appropriate to the audit conclusion, not only that test.

Question 778

During an outsourced-services renewal at a logistics group, the IS auditor learns that a certificate name mismatch is bypassed for a production integration. The affected operation supports freight tracking and fleet operations. Delivery commitments and partner data flow through this process. Which risk should the auditor treat as the PRIMARY concern arising from these facts?

  1. Weak trust chain validation and certificate lifecycle controls can enable impersonation or availability loss.
  2. Material attacks may go undetected or unhandled when monitoring coverage, correlation and escalation fail.
  3. Training attendance alone may not reduce unsafe behavior if role relevance and effectiveness are never assessed.
  4. Weak device identity, lifecycle and network segmentation can expose sensitive systems through unmanaged endpoints.

Explanation

Correct Answer

A:

Correct. Weak trust chain validation and certificate lifecycle controls can enable impersonation or availability loss. The described exception is: a certificate name mismatch is bypassed for a production integration. This risk ties the observation to the business significance of freight tracking and fleet operations, rather than treating management's claim as independent assurance.

Incorrect Answers

B:

Material attacks may go undetected or unhandled when monitoring coverage, correlation and escalation fail. It does not retain the evidence appropriate to the audit conclusion control over time.

C:

Training attendance alone may not reduce unsafe behavior if role relevance and effectiveness are never assessed. Recurrence here depends on evidence appropriate to the audit conclusion, not this safeguard.

D:

Weak device identity, lifecycle and network segmentation can expose sensitive systems through unmanaged endpoints. That protection can exist while evidence appropriate to the audit conclusion is still missing.

Question 779

During an outsourced-services renewal at a logistics group, the IS auditor learns that a certificate name mismatch is bypassed for a production integration. The affected operation supports freight tracking and fleet operations. Delivery commitments and partner data flow through this process. What test BEST distinguishes effective control operation from an unsupported assertion?

  1. Trace injected or historical test events from source ingestion through detection rules, triage and escalation records.
  2. Examine certificate issuance, chain validation, revocation, expiry monitoring and key custody; test rejection conditions.
  3. Map realistic threats to entry points, trust boundaries and known weaknesses, then validate controls against representative misuse cases.
  4. Inventory managed devices and test credential, encryption, isolation, patch and remote-wipe arrangements.

Explanation

Correct Answer

B:

Correct. Examine certificate issuance, chain validation, revocation, expiry monitoring and key custody; test rejection conditions. The procedure directly tests the reported condition that a certificate name mismatch is bypassed for a production integration. A defensible IS audit conclusion requires relevant and reliable evidence from the actual control population and period.

Incorrect Answers

A:

Not the most direct fieldwork procedure for these facts. That change would not implement evidence appropriate to the audit conclusion.

C:

Not the most direct fieldwork procedure for these facts. The evidence appropriate to the audit conclusion prerequisite remains unaddressed.

D:

Not the most direct fieldwork procedure for these facts. It changes a different feature than evidence appropriate to the audit conclusion.

Question 780

During an outsourced-services renewal at a logistics group, the IS auditor learns that a certificate name mismatch is bypassed for a production integration. The affected operation supports freight tracking and fleet operations. Delivery commitments and partner data flow through this process. What result would best demonstrate sustained operation of the corrected control?

  1. Certificate tests reject invalid or revoked identities and renewal records demonstrate reliable trusted service continuity.
  2. Observed endpoint and wireless tests isolate untrusted devices, remove weak credentials and protect lost-device data.
  3. Improved realistic reporting and safer decisions on repeated exercises demonstrate awareness effectiveness beyond completion rates.
  4. Controlled detections and case reviews show significant events are logged, prioritized and escalated within approved windows.

Explanation

Correct Answer

A:

Correct. Certificate tests reject invalid or revoked identities and renewal records demonstrate reliable trusted service continuity. This is stronger than a manager's verbal assurance because it can be checked against the observed issue that a certificate name mismatch is bypassed for a production integration. The reviewer must verify the remediation period and scope.

Incorrect Answers

B:

Not the strongest closure evidence for this case. It does not establish the requested evidence appropriate to the audit conclusion outcome.

C:

Not the strongest closure evidence for this case. The relevant success criterion is evidence appropriate to the audit conclusion; this measures a different function.

D:

Not the strongest closure evidence for this case. That result could pass without demonstrating evidence appropriate to the audit conclusion.