KCSA Overview OF Cloud Native Security Practice Question
An attacker gains execution inside a container and attempts to modify the container's root filesystem. The platform team has configured the deployment with `securityContext.readOnlyRootFilesystem: true`. What security mechanism does this enforce?
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
✓
Filesystem immutability and prevention of unauthorized file modifications
Setting `readOnlyRootFilesystem: true` prevents write operations to the container root filesystem, mitigating unauthorized file creation or tampering.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Filesystem immutability and prevention of unauthorized file modifications
Why this is correct
Read-only root filesystems prevent attackers from modifying binaries or dropping malware.
- ✗
Automatic container image re-signing
Why it's wrong here
Image signing is handled independently prior to runtime.
- ✗
Kernel capability escalation blocking
Why it's wrong here
Capabilities are controlled via `capabilities.drop` and `capabilities.add`.
- ✗
Network isolation via NetworkPolicies
Why it's wrong here
This controls filesystem immutability, not networking.
About these practice questions
This KCSA question is part of Courseiva's 320-question bank — original exam-style content with full explanations and wrong-answer analysis, never real exam questions or exam dumps. Learn why practice questions differ from exam dumps →
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.