KCNA Container Orchestration Practice Question
Which component is responsible for running containers on a Kubernetes node?
⚠ Common exam trap
It's easy for candidates to confuse kubelet with kube-controller-manager, thinking the controller manager handles node-level container operations, but the kubelet is the only component that directly manages containers on the node.
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
✓
kubelet
The kubelet is the primary node agent that runs on each Kubernetes node. It is responsible for ensuring that containers are running in a Pod as expected, by interacting with the container runtime (e.g., containerd or CRI-O) to start, stop, and monitor containers based on PodSpecs received from 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.
- ✗
kube-controller-manager
Why it's wrong here
The controller manager runs controllers that handle routine tasks, but it does not directly run containers on nodes.
- ✗
kube-proxy
Why it's wrong here
kube-proxy handles network proxying and load balancing for Services, not container execution.
- ✗
kube-apiserver
Why it's wrong here
The API server is the front-end of the Kubernetes control plane and does not run containers.
- ✓
kubelet
Why this is correct
The kubelet runs on each node and manages pod lifecycles, including starting containers via the container runtime.
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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.