KCSA Platform Security Practice Question
A security administrator wants to prevent container processes from writing to any part of their root filesystem except for designated ephemeral volumes. Which security context field should be configured?
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
✓
readOnlyRootFilesystem: true
Setting 'readOnlyRootFilesystem: true' in the container's security context makes the root filesystem read-only, enhancing security by preventing attackers from modifying binaries or writing malware.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
runAsUser: 1000
Why it's wrong here
Running as a non-root UID restricts permissions but does not make the filesystem read-only.
- ✓
readOnlyRootFilesystem: true
Why this is correct
This setting makes the container's root filesystem read-only, preventing unauthorized file modifications.
- ✗
allowPrivilegeEscalation: false
Why it's wrong here
This setting prevents processes from gaining new privileges, not from writing to the filesystem.
- ✗
privileged: false
Why it's wrong here
While disabling privileged mode is important, it does not make the root filesystem read-only.
About these practice questions
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JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed August 2026 · checked against the official CNCF / Linux Foundation exam blueprint
This KCSA practice question is part of Courseiva's free CNCF / Linux Foundation 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 KCSA exam.