KCNA Kubernetes Fundamentals Practice Question
A pod is stuck in Terminating state for several minutes. What is the most likely cause?
⚠ Common exam trap
CNCF often tests the misconception that a failing liveness probe or a misconfigured grace period causes a pod to be stuck in Terminating, when in fact the root cause is almost always a node or kubelet communication issue.
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 node is unreachable or the kubelet is not responding
When a pod is stuck in Terminating state, the most likely cause is that the node where the pod was running is unreachable or the kubelet is not responding. The kubelet is responsible for executing the pod's termination lifecycle, including sending SIGTERM and, after the grace period, SIGKILL. If the kubelet cannot communicate with the API server (e.g., due to node failure, network partition, or kubelet crash), the pod's finalizer cannot be removed, leaving it stuck in Terminating.
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 node is unreachable or the kubelet is not responding
Why this is correct
If the kubelet cannot be contacted, the pod cannot be terminated.
- ✗
The deployment is configured with a grace period
Why it's wrong here
A grace period is normal; after it expires, the pod should be force-deleted.
- ✗
The pod has a liveness probe that is failing
Why it's wrong here
Liveness probes affect container restarts, not pod termination.
- ✗
The pod's container runtime is paused
Why it's wrong here
Container runtime pause would not prevent deletion; the kubelet handles termination.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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