KCSA Kubernetes Security Fundamentals Practice Question
Which TWO mechanisms are used by Kubernetes admission controllers to enforce security policies during the API request lifecycle?
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
✓
Validating admission webhooks can reject object definitions that violate security standards.
Mutating admission controllers can modify incoming objects before they are persisted, and Validating admission controllers can evaluate and reject non-compliant requests.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Validating admission webhooks can reject object definitions that violate security standards.
Why this is correct
Validating webhooks inspect the final object state and return a pass/fail decision to the API server.
- ✗
kubelet automatically runs security audits on all container images prior to pull.
Why it's wrong here
Image scanning is typically handled by external CI/CD pipelines or container registries, not the kubelet admission phase.
- ✗
etcd executes consensus validation scripts to strip unauthorized RBAC rules.
Why it's wrong here
etcd is a distributed key-value store and does not execute scripts or security validation logic.
- ✓
Mutating admission webhooks can alter request payloads to enforce defaults like securityContext constraints.
Why this is correct
Mutating webhooks run first in the admission chain and can modify the object to ensure compliance with security baselines.
- ✗
kube-proxy inspects network payloads at Layer 7 to block unauthorized API requests.
Why it's wrong here
kube-proxy handles cluster networking and service routing, not API request admission control.
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.