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CRISC Practice Question: A control test reveals a 100% pass rate for a…
A control test reveals a 100% pass rate for a detective control. What does this indicate?
⚠ Common exam trap
It's easy for candidates to confuse a control's effectiveness (pass rate) with risk mitigation, assuming a perfect detection rate means the risk is fully addressed, but detective controls only provide visibility, not prevention or reduction of risk likelihood.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The control is operating effectively
A 100% pass rate for a detective control indicates that every time the control was tested, it successfully detected the condition or event it was designed to identify. This demonstrates the control is operating effectively, meaning it is functioning as intended and providing the expected level of assurance. For example, if the detective control is an intrusion detection system (IDS) that correctly alerts on all test attack patterns, a 100% pass rate confirms its detection logic and signature updates are working correctly.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
The control is operating effectively
Why this is correct
Pass rate indicates effective detection.
- ✗
The control is too expensive to maintain
Why it's wrong here
Cost not implied by pass rate.
- ✗
The control is compensating for other weaknesses
Why it's wrong here
Not indicated.
- ✗
The associated risk has been fully mitigated
Why it's wrong here
Detective control does not prevent risk.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This CRISC practice question is part of Courseiva's free ISACA certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the CRISC exam.