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.
A cluster administrator needs to provide storage to a pod that must read and write files, but the data does not need to persist beyond the pod's lifecycle. Which volume type should be used?
hostPath
Why wrong: hostPath persists on the node even after the pod is deleted, which is not required.
emptyDir
emptyDir provides temporary storage that is deleted when the pod terminates.
configMap
Why wrong: configMaps are for configuration data, not for read-write file storage.
PersistentVolumeClaim
Why wrong: PVCs are for persistent storage; the data would survive pod deletion, which is not desired.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
emptyDir
B is correct because emptyDir creates an empty volume that is provisioned when a pod is assigned to a node and exists as long as the pod is running. It allows both reading and writing files, and its contents are deleted when the pod is removed, matching the requirement that data does not need to persist beyond the pod's lifecycle.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
hostPath
Why it's wrong here
hostPath persists on the node even after the pod is deleted, which is not required.
emptyDir
Why this is correct
emptyDir provides temporary storage that is deleted when the pod terminates.
Related concept
Read the scenario before looking for a memorised answer.
configMap
Why it's wrong here
configMaps are for configuration data, not for read-write file storage.
PersistentVolumeClaim
Why it's wrong here
PVCs are for persistent storage; the data would survive pod deletion, which is not desired.
Common exam traps
The trap here is that candidates often confuse emptyDir with hostPath, thinking both provide temporary storage, but hostPath persists on the node and can cause data leakage or node-specific issues, while emptyDir is truly ephemeral and tied to the pod's lifecycle.
Detailed technical explanation
Under the hood, emptyDir volumes are backed by the node's local storage (typically a tmpfs filesystem if the medium is set to 'Memory', or the node's default disk), and they are created when the pod is scheduled. A subtle behavior is that if a pod is evicted or restarted on a different node, the emptyDir contents are lost, making it ideal for scratch space, caching, or temporary data that should not survive pod termination.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
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What to study next
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FAQ
Storage — This question tests Storage — Read the scenario before looking for a memorised answer..
The correct answer is: emptyDir — B is correct because emptyDir creates an empty volume that is provisioned when a pod is assigned to a node and exists as long as the pod is running. It allows both reading and writing files, and its contents are deleted when the pod is removed, matching the requirement that data does not need to persist beyond the pod's lifecycle.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 11, 2026
This CKA 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 CKA exam.
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