KCSA Kubernetes Cluster Component Security Practice Question
Which Kubernetes control plane component is responsible for noticing and responding when nodes go down or fail health checks?
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
✓
kube-controller-manager
The kube-controller-manager runs node lifecycle controllers that monitor node health and update node status.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
CoreDNS
Why it's wrong here
CoreDNS provides cluster internal DNS resolution.
- ✗
etcd
Why it's wrong here
Etcd is the storage backend and does not run active reconciliation loops.
- ✓
kube-controller-manager
Why this is correct
The node lifecycle controller inside kube-controller-manager monitors node health.
- ✗
kube-proxy
Why it's wrong here
Kube-proxy manages network routing rules on worker nodes.
About these practice questions
One of 320 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.