KCSA Kubernetes Cluster Component Security Practice Question
An administrator wants to ensure that the Kubernetes API server rejects any incoming requests that do not match known API resource paths or have invalid syntax. Which admission controller helps validate request structures and schema compliance?
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
✓
The built-in OpenAPI schema validation and ValidatingAdmissionWebhook.
Schema validation and structural compliance are handled by the built-in validation mechanisms and admission controllers in the API server.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
The etcd transaction validator.
Why it's wrong here
Etcd relies on the API server to validate resource schemas.
- ✗
The core scheduler admission plugin.
Why it's wrong here
The scheduler does not perform API schema admission checks.
- ✓
The built-in OpenAPI schema validation and ValidatingAdmissionWebhook.
Why this is correct
The API server enforces schema validation using OpenAPI schemas before passing requests to etcd.
- ✗
The kube-proxy filter admission module.
Why it's wrong here
Kube-proxy does not run admission control.
About these practice questions
One of 319 original KCSA practice questions on Courseiva, each with a full explanation and wrong-answer analysis — not exam dumps or protected exam content. 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.