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?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
hostPath
A is correct because `hostPath` mounts a file or directory from the host node's filesystem into a pod, allowing the pod to access persistent data stored on the node. This is a valid Kubernetes volume type defined in the PodSpec, commonly used for accessing host-level logs or configuration files, though it lacks portability across nodes.
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.
✓
hostPath
Why this is correct
hostPath mounts a file or directory from the host node's filesystem into the pod.
Related concept
Read the scenario before looking for a memorised answer.
✓
emptyDir
Why this is correct
emptyDir is a temporary directory that shares the pod's lifetime.
Related concept
Read the scenario before looking for a memorised answer.
✗
AWS Elastic Block Store (EBS) directly
Why it's wrong here
EBS volumes must be used via a PersistentVolume or CSI driver, not directly in a pod spec.
✗
Docker volume
Why it's wrong here
Docker volumes are not directly usable in Kubernetes; Kubernetes uses its own volume abstraction.
✓
PersistentVolumeClaim
Why this is correct
PVCs abstract the underlying storage and allow pods to request persistent storage.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may confuse Docker volumes (a legacy container runtime concept) with Kubernetes volumes, or assume cloud provider storage like EBS can be directly specified in a pod definition without a PVC or CSI driver.
Detailed technical explanation
How to think about this question
Under the hood, `emptyDir` creates an empty directory on the node's filesystem (backed by the node's disk, tmpfs, or ramfs depending on the `medium` field) that is shared across containers in the same pod and is deleted when the pod is removed. A `PersistentVolumeClaim` binds to a `PersistentVolume` that can be backed by various storage systems (e.g., NFS, iSCSI, cloud block storage) and is mounted into the pod, providing durable storage that survives pod restarts. In real-world scenarios, `hostPath` is often used for accessing the host's Docker socket or log files, but it is not recommended for production due to security and portability concerns.
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: hostPath — A is correct because `hostPath` mounts a file or directory from the host node's filesystem into a pod, allowing the pod to access persistent data stored on the node. This is a valid Kubernetes volume type defined in the PodSpec, commonly used for accessing host-level logs or configuration files, though it lacks portability across nodes.
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.
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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