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 command is used to backup etcd data using etcdctl?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "which command"
Why it matters: Tests specific CLI syntax. Recall the exact command and its required context — near-synonyms and partial matches are common distractors.
etcdctl backup
Why wrong: etcdctl backup is not a valid command.
etcdctl export
Why wrong: etcdctl export is not a standard command.
etcdctl snapshot save
This creates a snapshot backup of etcd.
etcdctl dump
Why wrong: etcdctl dump is not a valid command.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
etcdctl snapshot save
Option C is correct because `etcdctl snapshot save` is the official command in etcdctl v3 to create a point-in-time backup of the etcd data store. This command captures the entire key-value store and metadata into a snapshot file, which can later be restored using `etcdctl snapshot restore` 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
For each option: why learners choose it and why it is or isn't the right answer here.
etcdctl backup
Why it's wrong here
etcdctl backup is not a valid command.
etcdctl export
Why it's wrong here
etcdctl export is not a standard command.
etcdctl snapshot save
Why this is correct
This creates a snapshot backup of etcd.
Clue confirmation
The clue word "which command" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
etcdctl dump
Why it's wrong here
etcdctl dump is not a valid command.
Common exam traps
The trap here is that candidates confuse the deprecated v2 `etcdctl backup` command with the correct v3 `etcdctl snapshot save` command, or they assume any 'export' or 'dump' verb is sufficient for a full backup.
Trap categories for this question
Command / output trap
etcdctl backup is not a valid command.
Detailed technical explanation
The `etcdctl snapshot save` command uses the etcd v3 snapshot API to create a consistent snapshot by temporarily pausing writes (via a Raft consensus quiesce) to ensure data integrity. In production, snapshots should be taken regularly and stored off-cluster, as they are critical for disaster recovery; a common pitfall is forgetting to set the `--endpoints` flag when the default endpoint (127.0.0.1:2379) is not reachable from the control plane node.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
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.
What to study next
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FAQ
Cluster Architecture, Installation and Configuration — This question tests Cluster Architecture, Installation and Configuration — Read the scenario before looking for a memorised answer..
The correct answer is: etcdctl snapshot save — Option C is correct because `etcdctl snapshot save` is the official command in etcdctl v3 to create a point-in-time backup of the etcd data store. This command captures the entire key-value store and metadata into a snapshot file, which can later be restored using `etcdctl snapshot restore` to recover the cluster state.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Yes — watch for: "which command". Tests specific CLI syntax. Recall the exact command and its required context — near-synonyms and partial matches are common distractors.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 24, 2026
This CKA practice question is part of Courseiva's free CNCF certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the CKA exam.
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