This CKA practice question tests your understanding of workloads and scheduling. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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.
Which TWO commands can be used to view the rollout history of a Deployment?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
kubectl describe deployment my-app
Option C is correct because `kubectl describe deployment my-app` includes a 'RollingUpdateStrategy' section and a list of revision numbers under 'OldReplicaSets' and 'NewReplicaSet', which effectively shows the rollout history by displaying the current and previous ReplicaSets. Option E is correct because `kubectl rollout history deployment/my-app` is the dedicated command to list all revisions of a Deployment, showing revision numbers and change causes.
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 deployment my-app -o wide
Why it's wrong here
This shows current state, not history.
✗
kubectl get deployment my-app -o yaml
Why it's wrong here
This shows the current YAML, not historical revisions.
✓
kubectl describe deployment my-app
Why this is correct
The describe output includes annotations that show change-cause and revision history.
Related concept
Read the scenario before looking for a memorised answer.
✗
kubectl rollout status deployment/my-app
Why it's wrong here
This shows the current status of the rollout, not the history.
✓
kubectl rollout history deployment/my-app
Why this is correct
This command displays the revision history of the Deployment.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse `kubectl describe` (which shows current ReplicaSets but not a clean history list) with `kubectl rollout history` (the dedicated command), or mistakenly think `kubectl get -o yaml` or `-o wide` expose rollout history, when they only show the current state.
Trap categories for this question
Command / output trap
This shows current state, not history.
Detailed technical explanation
How to think about this question
Under the hood, a Deployment's rollout history is managed by the ReplicaSet controller, which creates a new ReplicaSet for each revision. The `kubectl rollout history` command queries the Deployment's `status.replicas` and `status.observedGeneration` fields, then lists all ReplicaSets associated with the Deployment, sorted by revision number. A real-world scenario where this matters is when you need to roll back to a specific revision after a failed update; `kubectl rollout history` shows the revision numbers, and `kubectl rollout undo deployment/my-app --to-revision=N` performs the rollback.
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 CKA 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.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this CKA question in full detail.
Workloads and Scheduling — This question tests Workloads and Scheduling — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: kubectl describe deployment my-app — Option C is correct because `kubectl describe deployment my-app` includes a 'RollingUpdateStrategy' section and a list of revision numbers under 'OldReplicaSets' and 'NewReplicaSet', which effectively shows the rollout history by displaying the current and previous ReplicaSets. Option E is correct because `kubectl rollout history deployment/my-app` is the dedicated command to list all revisions of a Deployment, showing revision numbers and change causes.
What should I do if I get this CKA question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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