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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 49

Question 480

During a routine controls assessment at a regional hospital, the IS auditor learns that an API receiver accepts duplicate messages without detecting repeated transaction identifiers. The affected operation supports patient-care scheduling and claims processing. Healthcare service continuity and protected records are at stake. Which observed evidence is MOST persuasive for a controlled audit follow-up?

  1. Source and target totals and controlled replay tests show complete, accurate, once-only processing of messages.
  2. End-to-end capacity and availability tests meet business service thresholds with demonstrated expansion and failure headroom.
  3. Protected time-synchronized records and forwarding-health alerts reproduce the expected event trail across the retention window.
  4. Time-stamped records and repeated-incident trend checks show timely service restoration and action on root causes.

Explanation

Correct Answer

A:

Correct. Source and target totals and controlled replay tests show complete, accurate, once-only processing of messages. This is stronger than a manager's verbal assurance because it can be checked against the observed issue that an API receiver accepts duplicate messages without detecting repeated transaction identifiers. 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.

Question 481

During a payment-platform modernization at a payment clearing organization, the IS auditor learns that a partner feed loses records but both applications report successful transfers. The affected operation supports merchant settlement and reconciliation. Finance and settlement integrity depend on this operation. Which risk statement is BEST supported by the recorded exception?

  1. Inadequate response and root-cause practices can prolong service disruption and allow repeat incidents.
  2. Interfaces can silently drop, duplicate or alter business data without adequate completeness and integrity checks.
  3. Uncontrolled user-managed systems can bypass approved security, integrity, continuity and change controls.
  4. Service measures that omit consumer outcomes or lack reliable calculation can conceal contractual and operational failures.

Explanation

Correct Answer

B:

Correct. Interfaces can silently drop, duplicate or alter business data without adequate completeness and integrity checks. The described exception is: a partner feed loses records but both applications report successful transfers. This risk ties the observation to the business significance of merchant settlement and reconciliation, rather than treating management's claim as independent assurance.

Incorrect Answers

A:

Inadequate response and root-cause practices can prolong service disruption and allow repeat incidents. That protection can exist while evidence appropriate to the audit conclusion is still missing.

C:

Uncontrolled user-managed systems can bypass approved security, integrity, continuity and change controls. It does not retain the evidence appropriate to the audit conclusion control over time.

D:

Service measures that omit consumer outcomes or lack reliable calculation can conceal contractual and operational failures. Recurrence here depends on evidence appropriate to the audit conclusion, not this safeguard.

Question 482

During a payment-platform modernization at a payment clearing organization, the IS auditor learns that a partner feed loses records but both applications report successful transfers. The affected operation supports merchant settlement and reconciliation. Finance and settlement integrity depend on this operation. During fieldwork, what is the BEST focused test of this condition?

  1. Review SLA definitions, responsibilities and exclusions; independently reproduce reported outcomes from transaction or ticket evidence.
  2. Sample change and patch events against approvals, risk assessments, baseline updates, testing and rollback records.
  3. Inventory critical end-user applications and test ownership, access, versioning, calculations and backup arrangements.
  4. Trace sample transactions end to end and reconcile control totals, acknowledgements and retry or error queues.

Explanation

Correct Answer

D:

Correct. Trace sample transactions end to end and reconcile control totals, acknowledgements and retry or error queues. The procedure directly tests the reported condition that a partner feed loses records but both applications report successful transfers. 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.

C:

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

Question 483

During a payment-platform modernization at a payment clearing organization, the IS auditor learns that a partner feed loses records but both applications report successful transfers. The affected operation supports merchant settlement and reconciliation. Finance and settlement integrity depend on this operation. Management states that remediation is complete. Which evidence BEST supports closing this issue?

  1. Time-stamped records and repeated-incident trend checks show timely service restoration and action on root causes.
  2. Documented EUC ownership and sampled access, calculation review and recovery tests demonstrate proportionate controls.
  3. Source and target totals and controlled replay tests show complete, accurate, once-only processing of messages.
  4. Agreed, auditable service metrics and documented breach handling confirm relevant user outcomes are monitored and governed.

Explanation

Correct Answer

C:

Correct. Source and target totals and controlled replay tests show complete, accurate, once-only processing of messages. This is stronger than a manager's verbal assurance because it can be checked against the observed issue that a partner feed loses records but both applications report successful transfers. The reviewer must verify the remediation period and scope.

Incorrect Answers

A:

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

B:

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

D:

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

Question 484

During a regulatory readiness review at a municipal government, the IS auditor learns that an interface mapping truncates account numbers during conversion. The affected operation supports citizen service accounts and public records. Public accountability and essential service access are affected. Which risk should the auditor treat as the PRIMARY concern arising from these facts?

  1. Inadequate response and root-cause practices can prolong service disruption and allow repeat incidents.
  2. Interfaces can silently drop, duplicate or alter business data without adequate completeness and integrity checks.
  3. Weak database controls can undermine transactional integrity, accountability and recoverability.
  4. Available infrastructure may not deliver committed business service capacity under peak load or shared failures.

Explanation

Correct Answer

B:

Correct. Interfaces can silently drop, duplicate or alter business data without adequate completeness and integrity checks. The described exception is: an interface mapping truncates account numbers during conversion. 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:

Inadequate response and root-cause practices can prolong service disruption and allow repeat incidents. Recurrence here depends on evidence appropriate to the audit conclusion, not this safeguard.

C:

Weak database controls can undermine transactional integrity, accountability and recoverability. It protects a different risk than the evidence appropriate to the audit conclusion requirement.

D:

Available infrastructure may not deliver committed business service capacity under peak load or shared failures. It does not retain the evidence appropriate to the audit conclusion control over time.

Question 485

During a regulatory readiness review at a municipal government, the IS auditor learns that an interface mapping truncates account numbers during conversion. The affected operation supports citizen service accounts and public records. Public accountability and essential service access are affected. What test BEST distinguishes effective control operation from an unsupported assertion?

  1. Review privileged activity, constraints, change history and recovery tests against representative data integrity risks.
  2. Compare service-level performance under representative workload, forecast trends and test plausible component failures.
  3. Sample change and patch events against approvals, risk assessments, baseline updates, testing and rollback records.
  4. Trace sample transactions end to end and reconcile control totals, acknowledgements and retry or error queues.

Explanation

Correct Answer

D:

Correct. Trace sample transactions end to end and reconcile control totals, acknowledgements and retry or error queues. The procedure directly tests the reported condition that an interface mapping truncates account numbers during conversion. 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.

B:

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

C:

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

Question 486

During a regulatory readiness review at a municipal government, the IS auditor learns that an interface mapping truncates account numbers during conversion. The affected operation supports citizen service accounts and public records. Public accountability and essential service access are affected. What result would best demonstrate sustained operation of the corrected control?

  1. Time-stamped records and repeated-incident trend checks show timely service restoration and action on root causes.
  2. Audited database changes, validated constraints and successful consistent restores support data accuracy and traceability.
  3. Source and target totals and controlled replay tests show complete, accurate, once-only processing of messages.
  4. End-to-end capacity and availability tests meet business service thresholds with demonstrated expansion and failure headroom.

Explanation

Correct Answer

C:

Correct. Source and target totals and controlled replay tests show complete, accurate, once-only processing of messages. This is stronger than a manager's verbal assurance because it can be checked against the observed issue that an interface mapping truncates account numbers during conversion. 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.

D:

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

Question 487

During a post-incident audit at a retail marketplace, the IS auditor learns that a file exchange is marked complete before checksums are compared. The affected operation supports customer checkout and order fulfillment. Customer transactions and market trust depend on effective control. Where should the audit team focus its principal finding?

  1. Interfaces can silently drop, duplicate or alter business data without adequate completeness and integrity checks.
  2. Missing or manipulable logs can prevent detection, accountability and reconstruction of material events.
  3. Uncontrolled user-managed systems can bypass approved security, integrity, continuity and change controls.
  4. Inadequate response and root-cause practices can prolong service disruption and allow repeat incidents.

Explanation

Correct Answer

A:

Correct. Interfaces can silently drop, duplicate or alter business data without adequate completeness and integrity checks. The described exception is: a file exchange is marked complete before checksums are compared. 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

B:

Missing or manipulable logs can prevent detection, accountability and reconstruction of material events. The configuration must instead establish evidence appropriate to the audit conclusion.

C:

Uncontrolled user-managed systems can bypass approved security, integrity, continuity and change controls. The evidence appropriate to the audit conclusion prerequisite remains unaddressed.

D:

Inadequate response and root-cause practices can prolong service disruption and allow repeat incidents. It changes a different feature than evidence appropriate to the audit conclusion.

Question 488

During a post-incident audit at a retail marketplace, the IS auditor learns that a file exchange is marked complete before checksums are compared. The affected operation supports customer checkout and order fulfillment. Customer transactions and market trust depend on effective control. Which substantive or control test most directly addresses the observation?

  1. Inventory critical end-user applications and test ownership, access, versioning, calculations and backup arrangements.
  2. Check source generation, clock synchronization, forwarding, access restrictions and retention with traceable test events.
  3. Trace sample transactions end to end and reconcile control totals, acknowledgements and retry or error queues.
  4. Sample change and patch events against approvals, risk assessments, baseline updates, testing and rollback records.

Explanation

Correct Answer

C:

Correct. Trace sample transactions end to end and reconcile control totals, acknowledgements and retry or error queues. The procedure directly tests the reported condition that a file exchange is marked complete before checksums are compared. 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 configuration must instead establish evidence appropriate to the audit conclusion.

B:

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. That change would not implement evidence appropriate to the audit conclusion.

Question 489

During a post-incident audit at a retail marketplace, the IS auditor learns that a file exchange is marked complete before checksums are compared. The affected operation supports customer checkout and order fulfillment. Customer transactions and market trust depend on effective control. What outcome would provide the STRONGEST evidence that the identified gap is resolved?

  1. Documented EUC ownership and sampled access, calculation review and recovery tests demonstrate proportionate controls.
  2. Time-stamped records and repeated-incident trend checks show timely service restoration and action on root causes.
  3. Protected time-synchronized records and forwarding-health alerts reproduce the expected event trail across the retention window.
  4. Source and target totals and controlled replay tests show complete, accurate, once-only processing of messages.

Explanation

Correct Answer

D:

Correct. Source and target totals and controlled replay tests show complete, accurate, once-only processing of messages. This is stronger than a manager's verbal assurance because it can be checked against the observed issue that a file exchange is marked complete before checksums are compared. The reviewer must verify the remediation period and scope.

Incorrect Answers

A:

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

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.

Question 490

During an outsourced-services renewal at a logistics group, the IS auditor learns that a message broker replay changes business balances with no reconciliation. The affected operation supports freight tracking and fleet operations. Delivery commitments and partner data flow through this process. What control exposure MOST directly explains why this observation is significant?

  1. Service measures that omit consumer outcomes or lack reliable calculation can conceal contractual and operational failures.
  2. Interfaces can silently drop, duplicate or alter business data without adequate completeness and integrity checks.
  3. Inadequate response and root-cause practices can prolong service disruption and allow repeat incidents.
  4. Available infrastructure may not deliver committed business service capacity under peak load or shared failures.

Explanation

Correct Answer

B:

Correct. Interfaces can silently drop, duplicate or alter business data without adequate completeness and integrity checks. The described exception is: a message broker replay changes business balances with no reconciliation. 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

A:

Service measures that omit consumer outcomes or lack reliable calculation can conceal contractual and operational failures. It changes a different feature than evidence appropriate to the audit conclusion.

C:

Inadequate response and root-cause practices can prolong service disruption and allow repeat incidents. The configuration must instead establish evidence appropriate to the audit conclusion.

D:

Available infrastructure may not deliver committed business service capacity under peak load or shared failures. The evidence appropriate to the audit conclusion prerequisite remains unaddressed.