CKA Practice Question: Cluster Architecture, Installation and Configuration
This CKA practice question tests your understanding of cluster architecture, installation and configuration. 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.
You have taken an etcd snapshot using 'ETCDCTL_API=3 etcdctl snapshot save snapshot.db'. Which TWO commands are needed to restore this snapshot to a new etcd member? (Choose TWO.)
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Update the etcd configuration (e.g., --data-dir) and restart the etcd service
Option C is correct because after restoring an etcd snapshot, the etcd service must be configured to use the restored data directory (e.g., via `--data-dir` or the `ETCD_DATA_DIR` environment variable) and then restarted. This ensures the new etcd member loads the snapshot data instead of starting with an empty or default 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.
✗
etcdctl endpoint health
Why it's wrong here
Checks health of etcd endpoints, not part of restore.
✗
etcdctl snapshot save backup.db
Why it's wrong here
This command saves a snapshot, not restores.
✓
Update the etcd configuration (e.g., --data-dir) and restart the etcd service
Why this is correct
After restore, you must configure etcd to use the new data directory.
Related concept
Read the scenario before looking for a memorised answer.
Read the scenario before looking for a memorised answer.
✗
etcdctl snapshot status snapshot.db
Why it's wrong here
Shows snapshot status, does not restore.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse snapshot status or health checks with actual restoration steps, forgetting that `snapshot restore` must be followed by updating the etcd configuration and restarting the service to make the restored data active.
Trap categories for this question
Command / output trap
This command saves a snapshot, not restores.
Detailed technical explanation
How to think about this question
The `etcdctl snapshot restore` command creates a new etcd data directory from the snapshot file, resetting the cluster ID and member ID to avoid conflicts with the original cluster. After restoration, the etcd service must be started with the `--initial-cluster-token` flag (or equivalent) to prevent the new member from joining an existing cluster as a duplicate; in a single-member restore scenario, simply pointing `--data-dir` to the restored path and restarting etcd suffices. This process is critical for disaster recovery, as it allows rebuilding a cluster from a consistent point-in-time backup without data corruption.
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: Update the etcd configuration (e.g., --data-dir) and restart the etcd service — Option C is correct because after restoring an etcd snapshot, the etcd service must be configured to use the restored data directory (e.g., via `--data-dir` or the `ETCD_DATA_DIR` environment variable) and then restarted. This ensures the new etcd member loads the snapshot data instead of starting with an empty or default 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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