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.
Which THREE statements about CSI (Container Storage Interface) are correct?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
CSI supports both block and file volumes.
Option A is correct because the CSI specification defines support for both block and file volumes, enabling storage plugins to provision raw block devices or filesystems. This flexibility allows workloads like databases to use block storage for performance, while applications requiring shared access can use file volumes.
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.
✓
CSI supports both block and file volumes.
Why this is correct
CSI can manage both types of volumes.
Related concept
Read the scenario before looking for a memorised answer.
✓
CSI allows storage vendors to develop custom drivers without modifying Kubernetes core.
Why this is correct
CSI is designed to be extensible and out-of-tree.
Related concept
Read the scenario before looking for a memorised answer.
✓
CSI supports additional features like volume snapshots and resize.
Why this is correct
These are CSI capabilities.
Related concept
Read the scenario before looking for a memorised answer.
✗
CSI only works with dynamic provisioning.
Why it's wrong here
CSI can also be used for static provisioning.
✗
CSI drivers must be compiled into the Kubernetes binary.
Why it's wrong here
CSI drivers are out-of-tree and deployed as DaemonSets or sidecars.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates assume CSI is limited to dynamic provisioning only, forgetting that static provisioning with pre-existing volumes is fully supported, or that CSI drivers must be compiled into Kubernetes, when in fact they run as external plugins.
Detailed technical explanation
How to think about this question
CSI uses a gRPC-based protocol over Unix Domain Sockets, with three key RPC services: Identity, Controller, and Node. The Controller service handles provisioning and attach/detach operations, while the Node service manages mount/umount on the host. This architecture allows storage vendors to ship drivers as containers without modifying Kubernetes core, and supports advanced features like volume snapshots (via the Snapshot beta API) and volume expansion (resize) through the CSI-Node-ExpandVolume RPC.
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 practitioner preparing for the CKA exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
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: CSI supports both block and file volumes. — Option A is correct because the CSI specification defines support for both block and file volumes, enabling storage plugins to provision raw block devices or filesystems. This flexibility allows workloads like databases to use block storage for performance, while applications requiring shared access can use file volumes.
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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