This CKA practice question tests your understanding of storage. 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.
An admin runs: kubectl edit pvc my-pvc --namespace=default and changes spec.resources.requests.storage from 10Gi to 20Gi. The PVC's StorageClass has allowVolumeExpansion: true. What else is required for the expansion to take effect?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The pod using the PVC must be restarted to detect the new size
Option B is correct: After editing the PVC, the expansion happens automatically in the background, but the pod must be restarted to recognize the new size (unless the filesystem supports online resizing). Option A is incorrect because recreating the pod is not necessary; a restart suffices. Option C is incorrect because no CSI driver update is needed. Option D is incorrect; the PVC status will update after expansion.
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.
✗
The pod using the PVC must be deleted and recreated
Why it's wrong here
A restart is sufficient, not a full recreate.
✓
The pod using the PVC must be restarted to detect the new size
Why this is correct
After the PVC is expanded, the pod needs to be restarted to see the new size, unless the filesystem supports online resizing.
Related concept
Read the scenario before looking for a memorised answer.
✗
No further action is needed; the PVC size will update immediately
Why it's wrong here
The PVC will expand, but the pod may need a restart to use the new size.
✗
The CSI driver must be updated to support expansion
Why it's wrong here
The StorageClass already has allowVolumeExpansion: true, so the driver supports it.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
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.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→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.
Identify which CKA exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Storage — This question tests Storage — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The pod using the PVC must be restarted to detect the new size — Option B is correct: After editing the PVC, the expansion happens automatically in the background, but the pod must be restarted to recognize the new size (unless the filesystem supports online resizing). Option A is incorrect because recreating the pod is not necessary; a restart suffices. Option C is incorrect because no CSI driver update is needed. Option D is incorrect; the PVC status will update after expansion.
What should I do if I get this CKA question wrong?
Identify which CKA exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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