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.
To back up etcd, which command should be used with 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 export
Why wrong: There is no 'export' subcommand; snapshot save is used.
etcdctl backup
Why wrong: There is no 'backup' subcommand in etcdctl.
etcdctl dump
Why wrong: There is no 'dump' subcommand.
etcdctl snapshot save
This command saves a snapshot of etcd data to a file.
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
The correct command to back up etcd is `etcdctl snapshot save`, which creates a point-in-time snapshot of the etcd key-value store. This is the officially recommended method for backing up etcd data in Kubernetes clusters, as it captures the entire database state consistently.
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 export
Why it's wrong here
There is no 'export' subcommand; snapshot save is used.
etcdctl backup
Why it's wrong here
There is no 'backup' subcommand in etcdctl.
etcdctl dump
Why it's wrong here
There is no 'dump' subcommand.
etcdctl snapshot save
Why this is correct
This command saves a snapshot of etcd data to a file.
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.
Common exam traps
The trap here is that candidates may confuse `etcdctl` subcommands with similar-sounding Linux backup commands (like `dump` or `export`) or assume a generic `backup` subcommand exists, when the CKA exam specifically tests knowledge of the exact `snapshot save` syntax.
Trap categories for this question
Command / output trap
There is no 'export' subcommand; snapshot save is used.
Detailed technical explanation
The `etcdctl snapshot save` command uses the Raft consensus protocol to ensure the snapshot is consistent across all etcd members, even during ongoing writes. The snapshot file is a binary dump of the entire etcd database, which can later be restored using `etcdctl snapshot restore` to recover the cluster state. In production, it is critical to run this command against a single etcd member to avoid overwhelming the cluster, and to verify the snapshot with `etcdctl snapshot status`.
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 — The correct command to back up etcd is `etcdctl snapshot save`, which creates a point-in-time snapshot of the etcd key-value store. This is the officially recommended method for backing up etcd data in Kubernetes clusters, as it captures the entire database state consistently.
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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