Quick Answer
The correct answer is that ROLLBACK_COMPLETE indicates the stack update failed and CloudFormation automatically reverted to the previous working stack version. This status means CloudFormation detected an error during the update process—such as a resource creation failure, a permissions issue, or a template syntax problem—and then systematically reversed all changes made during the update to restore the stack to its last known good state. On the AWS Certified DevOps Engineer Professional DOP-C02 exam, this concept tests your understanding of CloudFormation’s failure recovery behavior and how to interpret stack events in the CLI output. A common trap is confusing ROLLBACK_COMPLETE with a successful update or a deletion; remember that any status containing “ROLLBACK” signals a failure and a return to the prior configuration. Memory tip: think of “ROLLBACK” as “revert to the last known good backup”—if you see it, the update failed, and the stack is safe but not updated.
This DOP-C02 practice question tests your understanding of sdlc automation. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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.
Refer to the exhibit. A DevOps engineer ran the above AWS CLI command after a CloudFormation stack update. What does the status 'ROLLBACK_COMPLETE' indicate?
The stack update is in progress.
Why wrong: In-progress status would be UPDATE_IN_PROGRESS.
The stack was deleted successfully.
Why wrong: Delete status would be DELETE_COMPLETE.
The stack was created successfully.
Why wrong: ROLLBACK is not a success status.
The stack update failed and CloudFormation reverted to the previous stack.
ROLLBACK_COMPLETE indicates a failed update with rollback.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
The stack update failed and CloudFormation reverted to the previous stack.
Option D is correct because ROLLBACK_COMPLETE means the update failed and CloudForm reverted to the previous state. Option A is wrong because the stack was not created successfully; it rolled back. Option B is wrong because ROLLBACK_COMPLETE is not a delete status. Option C is wrong because it is not an update in progress.
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.
The stack update is in progress.
Why it's wrong here
In-progress status would be UPDATE_IN_PROGRESS.
The stack was deleted successfully.
Why it's wrong here
Delete status would be DELETE_COMPLETE.
The stack was created successfully.
Why it's wrong here
ROLLBACK is not a success status.
The stack update failed and CloudFormation reverted to the previous stack.
Why this is correct
ROLLBACK_COMPLETE indicates a failed update with rollback.
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 cloud solutions architect for a retail company is evaluating services for a new workload. The correct answer here reflects best practice for the specific scenario described — not a general cloud recommendation. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.
What to study next
Identify which DOP-C02 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
SDLC Automation — This question tests SDLC Automation — Read the scenario before looking for a memorised answer..
The correct answer is: The stack update failed and CloudFormation reverted to the previous stack. — Option D is correct because ROLLBACK_COMPLETE means the update failed and CloudForm reverted to the previous state. Option A is wrong because the stack was not created successfully; it rolled back. Option B is wrong because ROLLBACK_COMPLETE is not a delete status. Option C is wrong because it is not an update in progress.
Identify which DOP-C02 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.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 20, 2026
This DOP-C02 practice question is part of Courseiva's free Amazon Web Services 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 DOP-C02 exam.
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