The correct answer is that etcdctl snapshot save creates a snapshot of all etcd data, and the restore process relies on etcdctl snapshot restore to recover the cluster state. This is because etcd stores the entire Kubernetes cluster state, including all objects and configuration, so a snapshot captures a point-in-time copy of this critical data. When restoring, etcdctl snapshot restore writes the snapshot to a new data directory, which then allows etcd members to start from that recovered state—a mandatory step for cluster recovery after a disaster. On the Certified Kubernetes Administrator CKA exam, this topic tests your ability to handle etcd backup and restore scenarios, often appearing in troubleshooting or recovery tasks where you must distinguish between save and restore commands. A common trap is confusing snapshot save with snapshot restore, or forgetting that restore requires a new data directory. Memory tip: think “save to store, restore to recover”—the first command preserves data, the second brings it back to life.
CKA Practice Question: Cluster Architecture, Installation and Configuration
This CKA practice question tests your understanding of cluster architecture, installation and configuration. 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 of the following are true about etcd backup and restore?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Restoring from a snapshot requires using 'etcdctl snapshot restore'
Option B is correct because 'etcdctl snapshot restore' is the command used to restore an etcd cluster from a previously taken snapshot. This command restores the snapshot data to a new data directory, which can then be used to start etcd members. It is a required step in the restore process to recover the cluster state.
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.
✗
After restoring a snapshot, you must restart all etcd members manually
Why it's wrong here
After restore, the etcd process must be started, but typically you restart the etcd service on the node where you restored.
✓
Restoring from a snapshot requires using 'etcdctl snapshot restore'
Why this is correct
Restore is the command to restore from a snapshot file.
Related concept
Read the scenario before looking for a memorised answer.
✗
Etcd snapshots exclude cluster member information
Why it's wrong here
Snapshots include all cluster data, including member information.
✓
Snapshots can be taken while etcd is running
Why this is correct
etcdctl snapshot save works on a live etcd instance.
Related concept
Read the scenario before looking for a memorised answer.
✓
etcdctl snapshot save creates a snapshot of all etcd data
Why this is correct
The snapshot includes all keys and metadata.
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 think snapshots exclude cluster member information (option C) because they confuse etcd snapshots with simple key-value backups, but etcd snapshots actually include all cluster metadata required for full recovery.
Detailed technical explanation
How to think about this question
When using 'etcdctl snapshot restore', the command creates a new cluster configuration with a new cluster ID and member ID to avoid conflicts with the existing cluster. This is crucial in disaster recovery scenarios where the original cluster is completely lost, as it allows the restored snapshot to form a new cluster without needing the original member metadata. The snapshot itself is a point-in-time copy of the entire key-value store, including all cluster metadata.
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.
Cluster Architecture, Installation and Configuration — This question tests Cluster Architecture, Installation and Configuration — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Restoring from a snapshot requires using 'etcdctl snapshot restore' — Option B is correct because 'etcdctl snapshot restore' is the command used to restore an etcd cluster from a previously taken snapshot. This command restores the snapshot data to a new data directory, which can then be used to start etcd members. It is a required step in the restore process to recover the cluster state.
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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