This CKA practice question tests your understanding of storage. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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 THREE of the following are valid ways to provide storage to a pod in Kubernetes? (Select three.)
hostPath
hostPath mounts a file or directory from the host node's filesystem.
emptyDir
emptyDir is ephemeral storage that exists as long as the pod runs.
secret
Why wrong: Secrets are for sensitive data, not general storage.
PersistentVolumeClaim
PVCs are used to request persistent storage from the cluster.
configMap
Why wrong: ConfigMaps are for configuration data, not general purpose storage.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
hostPath
PersistentVolumeClaim, emptyDir, and hostPath are all valid volume sources. configMap and secret are also valid, but they are for configuration data, not general storage. However, the question asks for 'storage' broadly. Typically, these are considered storage options. But to align with common exam topics, I'll include configMap as a valid volume type. Actually, configMap is a volume type that provides configuration data, not general storage. I'll adjust: correct answers are PVC, emptyDir, hostPath. ConfigMap and secret are also volume types, but they are for specific purposes. I'll stick with PVC, emptyDir, hostPath as the most direct storage options.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
hostPath
Why this is correct
hostPath mounts a file or directory from the host node's filesystem.
Related concept
Static NAT maps one inside address to one outside address.
emptyDir
Why this is correct
emptyDir is ephemeral storage that exists as long as the pod runs.
Related concept
Static NAT maps one inside address to one outside address.
secret
Why it's wrong here
Secrets are for sensitive data, not general storage.
PersistentVolumeClaim
Why this is correct
PVCs are used to request persistent storage from the cluster.
Related concept
Static NAT maps one inside address to one outside address.
configMap
Why it's wrong here
ConfigMaps are for configuration data, not general purpose storage.
Common exam traps
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Detailed technical explanation
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Real-world example
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.
What to study next
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related CKA NAT questions on configuration and troubleshooting.
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FAQ
Storage — This question tests Storage — Static NAT maps one inside address to one outside address..
The correct answer is: hostPath — PersistentVolumeClaim, emptyDir, and hostPath are all valid volume sources. configMap and secret are also valid, but they are for configuration data, not general storage. However, the question asks for 'storage' broadly. Typically, these are considered storage options. But to align with common exam topics, I'll include configMap as a valid volume type. Actually, configMap is a volume type that provides configuration data, not general storage. I'll adjust: correct answers are PVC, emptyDir, hostPath. ConfigMap and secret are also volume types, but they are for specific purposes. I'll stick with PVC, emptyDir, hostPath as the most direct storage options.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related CKA NAT questions on configuration and troubleshooting.
Static NAT maps one inside address to one outside address.
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Last reviewed: Jun 21, 2026
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