CAS-004 Security Architecture Practice Question
An organization wants to implement an immutable infrastructure for its containerized applications. Which security benefit is most directly achieved by immutability?
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
✓
Prevents unauthorized modifications to running containers
Immutable infrastructure ensures that once a container image is deployed, it is never modified. Any change requires a new image deployment, which prevents configuration drift and unauthorized changes.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Eliminates need for runtime security monitoring
Why it's wrong here
Runtime monitoring is still needed for anomalies.
- ✓
Prevents unauthorized modifications to running containers
Why this is correct
Correct – containers are replaced, not patched in place.
- ✗
Allows use of privileged containers securely
Why it's wrong here
Privileged containers are still risky.
- ✗
Reduces image scanning frequency
Why it's wrong here
Scanning still needed before deployment.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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