This CKA practice question tests your understanding of storage. 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 unable to start because the PersistentVolumeClaim it references is still in 'Pending' state. What is the most likely cause?
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 the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The PersistentVolumeClaim's storage class does not exist or cannot provision a volume
A PersistentVolumeClaim (PVC) remains in 'Pending' state when it cannot find a suitable PersistentVolume (PV) to bind to or when its storage class cannot dynamically provision one. The most common cause is that the referenced storage class does not exist, is misspelled, or lacks a provisioner that can create the volume, leaving the PVC unbound and the pod unable to start.
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 PersistentVolumeClaim's storage class does not exist or cannot provision a volume
Why this is correct
If the StorageClass is missing or misconfigured, the PVC will stay Pending.
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 pod's YAML has a syntax error
Why it's wrong here
A syntax error would prevent the pod from being created, but the PVC status would still be Bound if provisioned.
✗
The pod is using a hostPath volume
Why it's wrong here
hostPath volumes do not use PVCs; they are directly referenced in the pod spec.
✗
The node has insufficient CPU resources
Why it's wrong here
Node resource constraints affect pod scheduling but not PVC binding; PVC Pending is a storage issue.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse 'Pending' state for a PVC with pod scheduling issues, thinking it is a resource constraint on the node, rather than recognizing it as a storage binding or provisioning failure.
Detailed technical explanation
How to think about this question
When a PVC references a storage class, Kubernetes uses the provisioner defined in that storage class to dynamically create a PV. If the storage class does not exist, the PVC remains unbound indefinitely, as the default storage class (if any) is not automatically used unless explicitly specified. This is a common misconfiguration when migrating clusters or using custom storage classes without verifying their availability.
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 small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this CKA question in full detail.
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 PersistentVolumeClaim's storage class does not exist or cannot provision a volume — A PersistentVolumeClaim (PVC) remains in 'Pending' state when it cannot find a suitable PersistentVolume (PV) to bind to or when its storage class cannot dynamically provision one. The most common cause is that the referenced storage class does not exist, is misspelled, or lacks a provisioner that can create the volume, leaving the PVC unbound and the pod unable to start.
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.
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.
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Question Discussion
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