This EX294 practice question tests your understanding of manage automation security and operations. 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.
A developer wants to encrypt a string in a playbook variable file. Which command should they use?
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.
ansible-vault rekey
Why wrong: Changes the vault password.
ansible-vault create
Why wrong: Creates a new vault file, not encrypt a string.
ansible-vault edit
Why wrong: Edits an existing vault, not encrypt a string.
ansible-vault encrypt_string
Encrypts a single string inline.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
ansible-vault encrypt_string
Option D is correct because `ansible-vault encrypt_string` is specifically designed to encrypt a single string value for use in a playbook variable file, without encrypting the entire file. This command outputs the encrypted string in a format that can be directly pasted into a YAML variable definition, preserving the rest of the file as plaintext.
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.
ansible-vault rekey
Why it's wrong here
Changes the vault password.
ansible-vault create
Why it's wrong here
Creates a new vault file, not encrypt a string.
ansible-vault edit
Why it's wrong here
Edits an existing vault, not encrypt a string.
ansible-vault encrypt_string
Why this is correct
Encrypts a single string inline.
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 confuse encrypting a single string with encrypting an entire file, leading them to choose `ansible-vault create` or `ansible-vault edit` instead of the specific `encrypt_string` subcommand.
Detailed technical explanation
Under the hood, `ansible-vault encrypt_string` uses AES-256 in CBC mode with a PBKDF2-derived key from the vault password, producing a ciphertext prefixed with `$ANSIBLE_VAULT;1.1;AES256`. This allows the encrypted string to be embedded directly in a YAML variable file (e.g., `password: !vault | $ANSIBLE_VAULT...`), while other variables remain unencrypted. In real-world scenarios, this is critical for managing secrets like API tokens or database passwords in version-controlled playbooks without exposing the entire variable file.
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 EX294 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
Manage automation security and operations — This question tests Manage automation security and operations — Read the scenario before looking for a memorised answer..
The correct answer is: ansible-vault encrypt_string — Option D is correct because `ansible-vault encrypt_string` is specifically designed to encrypt a single string value for use in a playbook variable file, without encrypting the entire file. This command outputs the encrypted string in a format that can be directly pasted into a YAML variable definition, preserving the rest of the file as plaintext.
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 25, 2026
This EX294 practice question is part of Courseiva's free Red Hat 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 EX294 exam.
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