KCNA Kubernetes Fundamentals Practice Question
A Deployment is configured with 'replicas: 3'. After a node failure, only 2 pods are running. What component ensures that a new pod is scheduled to restore the desired replica count?
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 the ReplicaSet controller, which detects the mismatch and creates a new pod.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
kube-scheduler
Why it's wrong here
The scheduler assigns pods to nodes, but the controller creates the pod object.
- ✓
kube-controller-manager
Why this is correct
The controller manager includes the ReplicaSet controller that ensures the desired number of pods.
- ✗
kubelet
Why it's wrong here
kubelet runs on the node and manages containers, but does not create pods for a Deployment.
- ✗
kube-proxy
Why it's wrong here
kube-proxy manages network rules, not pod creation.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This KCNA practice question is part of Courseiva's free CNCF 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 KCNA exam.