- A
kubectl get events
Why wrong: Events show cluster events but not structured rollout history.
- B
kubectl describe deployment my-deployment
Why wrong: Describe shows current state but not rollout history.
- C
kubectl rollout history deployment/my-deployment
This command displays the rollout history, including revisions and cause of updates.
- D
kubectl logs deployment/my-deployment
Why wrong: Logs are for pods, not for deployment rollout history.
Question 845 of 997
Kubectl Rollout History — Investigate Stuck Deployments | CKNA Explained
This KCNA practice question tests your understanding of container orchestration. 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 developer creates a Deployment with 3 replicas. After updating the pod template, they run 'kubectl rollout status deployment/my-deployment' and see that the rollout is stuck. Which command should they use to investigate the rollout history?
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 rollout history deployment/my-deployment
Option C is correct because 'kubectl rollout history' is the dedicated command to view the revision history of a Deployment, including the changes made to the pod template in each revision. When a rollout is stuck, this command helps identify which revision caused the issue and allows you to roll back to a previous stable revision. The other commands provide general debugging information but do not specifically show the rollout history.
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 get events
Why it's wrong here
Events show cluster events but not structured rollout history.
- ✗
kubectl describe deployment my-deployment
Why it's wrong here
Describe shows current state but not rollout history.
- ✓
kubectl rollout history deployment/my-deployment
Why this is correct
This command displays the rollout history, including revisions and cause of updates.
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 logs deployment/my-deployment
Why it's wrong here
Logs are for pods, not for deployment rollout history.
Common exam traps
Common exam trap: answer the scenario, not the keyword
CNCF often tests the distinction between commands that show current state (describe, get events) versus commands that show historical state (rollout history), trapping candidates who confuse 'investigating the rollout history' with general troubleshooting.
Trap categories for this question
Command / output trap
Events show cluster events but not structured rollout history.
Detailed technical explanation
How to think about this question
Under the hood, a Deployment's rollout history is stored as a series of ReplicaSets, each representing a revision of the pod template. The 'kubectl rollout history' command queries the Deployment's 'revisionHistoryLimit' (default 10) and displays the revision numbers and change-causes. In a real-world scenario, if a rollout is stuck due to a misconfigured container image or resource limit, you can use 'kubectl rollout undo deployment/my-deployment --to-revision=<N>' to revert to a known good revision, which is only possible after identifying the revision via the history command.
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.
- →
Container Orchestration — study guide chapter
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FAQ
Questions learners often ask
What does this KCNA question test?
Container Orchestration — This question tests Container Orchestration — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: kubectl rollout history deployment/my-deployment — Option C is correct because 'kubectl rollout history' is the dedicated command to view the revision history of a Deployment, including the changes made to the pod template in each revision. When a rollout is stuck, this command helps identify which revision caused the issue and allows you to roll back to a previous stable revision. The other commands provide general debugging information but do not specifically show the rollout history.
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.
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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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