CAS-004 Governance, Risk, and Compliance Practice Question
Which security metric measures the average time it takes to detect a security incident after it has occurred?
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
✓
Mean Time to Detect (MTTD)
Mean Time to Detect (MTTD) is a key metric for incident detection efficiency.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Mean Time to Detect (MTTD)
Why this is correct
MTTD is the correct metric.
- ✗
Mean Time Between Failures (MTBF)
Why it's wrong here
MTBF is a reliability metric, not security.
- ✗
Mean Time to Respond (MTTR)
Why it's wrong here
MTTR measures time to respond, not detect.
- ✗
Mean Time to Recover (MTTR)
Why it's wrong here
This is a recovery metric, often confused but different.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This CAS-005 practice question is part of Courseiva's free CompTIA 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 CAS-005 exam.