This LPIC-1 practice question tests your understanding of linux installation and package management. 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 Yellowdog Updater Modified (YUM) transaction that included several package installations and upgrades completed successfully, but a recent change caused a service to break. The administrator wants to revert the entire transaction using its transaction ID. Which command should be used?
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.
yum history redo 123
Why wrong: Redoes the transaction.
yum remove <packages>
Why wrong: Manual removal, not transaction revert.
yum history rollback 123
Why wrong: Rolls back to a transaction, not undo.
yum history undo 123
Undoes transaction with ID 123.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
yum history undo 123
Option A is correct because yum history undo ID reverts a specific transaction. Option B is incorrect because yum history redo repeats the transaction. Option C is incorrect because yum history rollback reverts to a point, but not a single transaction. Option D is incorrect because yum remove is not transaction-based.
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.
yum history redo 123
Why it's wrong here
Redoes the transaction.
yum remove <packages>
Why it's wrong here
Manual removal, not transaction revert.
yum history rollback 123
Why it's wrong here
Rolls back to a transaction, not undo.
yum history undo 123
Why this is correct
Undoes transaction with ID 123.
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
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
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 LPIC-1 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
Identify which LPIC-1 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
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FAQ
Linux Installation and Package Management — This question tests Linux Installation and Package Management — Read the scenario before looking for a memorised answer..
The correct answer is: yum history undo 123 — Option A is correct because yum history undo ID reverts a specific transaction. Option B is incorrect because yum history redo repeats the transaction. Option C is incorrect because yum history rollback reverts to a point, but not a single transaction. Option D is incorrect because yum remove is not transaction-based.
Identify which LPIC-1 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
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 LPIC-1 practice question is part of Courseiva's free LPI 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 LPIC-1 exam.
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