- A
kubectl logs <pod-name>
Why wrong: Logs show container output, but the pod hasn't started yet, so logs are empty.
- B
kubectl exec -it <pod-name> -- sh
Why wrong: Cannot exec into a pending pod because it is not running.
- C
kubectl describe pod <pod-name>
Describe shows events and status that indicate scheduling issues.
- D
kubectl get pod <pod-name> -o yaml
Why wrong: YAML output shows the current state but not the detailed events.
Question 821 of 997
How to Troubleshoot a Pod Stuck in Pending State
This KCNA practice question tests your understanding of kubernetes fundamentals. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A pod is stuck in the 'Pending' state. Which command would you use to get more details about why the pod cannot be scheduled?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"which command"Why it matters: Tests specific CLI syntax. Recall the exact command and its required context — near-synonyms and partial matches are common distractors.
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
✓
kubectl describe pod <pod-name>
Option C is correct because `kubectl describe pod <pod-name>` provides detailed event logs and status information, including scheduler decisions, resource constraints, and node conditions that explain why a pod remains in 'Pending' state. The 'Pending' state typically indicates the pod has not been scheduled, and `kubectl describe` surfaces the exact reason, such as insufficient CPU/memory, persistent volume claims not bound, or node selector mismatches.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
kubectl logs <pod-name>
Why it's wrong here
Logs show container output, but the pod hasn't started yet, so logs are empty.
- ✗
kubectl exec -it <pod-name> -- sh
Why it's wrong here
Cannot exec into a pending pod because it is not running.
- ✓
kubectl describe pod <pod-name>
Why this is correct
Describe shows events and status that indicate scheduling issues.
Clue confirmation
The clue word "which command" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
kubectl get pod <pod-name> -o yaml
Why it's wrong here
YAML output shows the current state but not the detailed events.
Common exam traps
Common exam trap: answer the scenario, not the keyword
A common trap in Kubernetes exams is confusing `kubectl describe pod` (which shows dynamic runtime events and scheduling reasons) with `kubectl get pod -o yaml` (which shows static configuration). Candidates may think YAML output provides the same troubleshooting detail, but it lacks the scheduler decisions and event history that explain why a pod is 'Pending'.
Trap categories for this question
Command / output trap
Logs show container output, but the pod hasn't started yet, so logs are empty.
Detailed technical explanation
How to think about this question
Under the hood, the Kubernetes scheduler writes events to the pod's `status.conditions` and the cluster's event stream when it cannot assign a node; `kubectl describe` queries the API server for both the pod object and associated events, revealing reasons like '0/3 nodes are available: 1 Insufficient cpu, 2 node(s) didn't match node selector'. In real-world scenarios, a pod may also be stuck in 'Pending' due to a PersistentVolumeClaim that is still pending binding, which `kubectl describe` will show as a warning event, whereas `kubectl get -o yaml` only shows the PVC name without the binding failure reason.
KKey Concepts to Remember
- Read the scenario before looking for a memorised answer.
- Find the constraint that changes the correct option.
- Eliminate answers that are true in general but not in this case.
TExam Day Tips
- Watch for words such as best, first, most likely and least administrative effort.
- Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A practitioner preparing for the KCNA exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
- →
Kubernetes Fundamentals — study guide chapter
Learn the concepts, then practise the questions
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Targeted practice on this topic area only
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FAQ
Questions learners often ask
What does this KCNA question test?
Kubernetes Fundamentals — This question tests Kubernetes Fundamentals — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: kubectl describe pod <pod-name> — Option C is correct because `kubectl describe pod <pod-name>` provides detailed event logs and status information, including scheduler decisions, resource constraints, and node conditions that explain why a pod remains in 'Pending' state. The 'Pending' state typically indicates the pod has not been scheduled, and `kubectl describe` surfaces the exact reason, such as insufficient CPU/memory, persistent volume claims not bound, or node selector mismatches.
What should I do if I get this KCNA question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Are there clue words in this question I should notice?
Yes — watch for: "which command". Tests specific CLI syntax. Recall the exact command and its required context — near-synonyms and partial matches are common distractors.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
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Last reviewed: Jul 4, 2026
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.
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