- A
The PersistentVolume has retain policy "Retain"; manually delete and recreate the volume.
Retain policy leaves PV in 'Released' state; manual intervention is needed.
- B
The PersistentVolume has reclaim policy "Recycle"; it is not supported in GKE.
Why wrong: Recycle is deprecated and not the likely cause.
- C
The PersistentVolumeClaim was not created with the correct storage class; recreate with reclaim policy "Delete".
Why wrong: Reclaim policy not the root cause; PVC creation is fine.
- D
The PersistentVolumeClaim's access mode is ReadWriteOnce, which prevents attachment to a new node; change to ReadWriteMany.
Why wrong: ReadWriteOnce is typical for stateful sets and not the cause of 'released' status.
- E
The PersistentVolume has reclaim policy "Retain" and the previous pod's volume attachment is not cleared; use a StatefulSet with volumeClaimTemplates and reclaim policy "Delete".
Why wrong: Delete reclaim policy would delete data, which is not desired for stateful applications.
Google PCA Ensure solution and operations reliability Practice Question
This PCA practice question tests your understanding of ensure solution and operations reliability. 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 financial services company runs a stateful backend service on Google Kubernetes Engine (GKE) using StatefulSets with Persistent Volumes. They observe that after a node failure, the pod is rescheduled on a different node but the Persistent Volume cannot be attached because it is still "released" and not "available". What is the most likely cause and solution?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"most likely"Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
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 PersistentVolume has retain policy "Retain"; manually delete and recreate the volume.
Option A is correct because when a PersistentVolume (PV) has a reclaim policy of 'Retain', after the PersistentVolumeClaim (PVC) is deleted, the PV enters a 'Released' state and is not automatically recycled for reuse. The underlying storage resource (e.g., a Compute Engine persistent disk) still exists but the PV cannot be re-attached until an administrator manually deletes the PV and recreates it, or edits the PV to remove the claim reference. This explains why the pod rescheduled on a new node cannot attach the volume.
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 PersistentVolume has retain policy "Retain"; manually delete and recreate the volume.
Why this is correct
Retain policy leaves PV in 'Released' state; manual intervention is needed.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
The PersistentVolume has reclaim policy "Recycle"; it is not supported in GKE.
Why it's wrong here
Recycle is deprecated and not the likely cause.
- ✗
The PersistentVolumeClaim was not created with the correct storage class; recreate with reclaim policy "Delete".
Why it's wrong here
Reclaim policy not the root cause; PVC creation is fine.
- ✗
The PersistentVolumeClaim's access mode is ReadWriteOnce, which prevents attachment to a new node; change to ReadWriteMany.
Why it's wrong here
ReadWriteOnce is typical for stateful sets and not the cause of 'released' status.
- ✗
The PersistentVolume has reclaim policy "Retain" and the previous pod's volume attachment is not cleared; use a StatefulSet with volumeClaimTemplates and reclaim policy "Delete".
Why it's wrong here
Delete reclaim policy would delete data, which is not desired for stateful applications.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Google Cloud often tests the distinction between PV reclaim policies and the 'Released' vs 'Available' states, where candidates mistakenly think the issue is with the PVC's access mode or storage class rather than the PV's manual cleanup requirement.
Detailed technical explanation
How to think about this question
When a PV has reclaim policy 'Retain', the PV's status transitions from 'Bound' to 'Released' after the PVC is deleted, but the underlying disk (e.g., a GCE persistent disk) is not deleted. The PV retains a claim reference (uid) that prevents re-binding until manually cleared. An administrator must either delete the PV object and recreate it, or use `kubectl patch pv <pv-name> -p '{"spec":{"claimRef":null}}'` to remove the claim reference and change the status to 'Available'. This is a common operational pitfall in stateful workloads on GKE.
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 media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
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.
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Ensure solution and operations reliability — study guide chapter
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FAQ
Questions learners often ask
What does this PCA question test?
Ensure solution and operations reliability — This question tests Ensure solution and operations reliability — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The PersistentVolume has retain policy "Retain"; manually delete and recreate the volume. — Option A is correct because when a PersistentVolume (PV) has a reclaim policy of 'Retain', after the PersistentVolumeClaim (PVC) is deleted, the PV enters a 'Released' state and is not automatically recycled for reuse. The underlying storage resource (e.g., a Compute Engine persistent disk) still exists but the PV cannot be re-attached until an administrator manually deletes the PV and recreates it, or edits the PV to remove the claim reference. This explains why the pod rescheduled on a new node cannot attach the volume.
What should I do if I get this PCA 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: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
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: Jun 30, 2026
This PCA practice question is part of Courseiva's free Google Cloud 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 PCA exam.
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