- A
Configure the CodeDeploy deployment group to automatically roll back on failure.
Why wrong: CodeDeploy is not used for CloudFormation deployments.
- B
In the CodePipeline CloudFormation deployment action, set 'Stack failure behavior' to 'ROLLBACK'.
This configures automatic rollback on stack update failure.
- C
Configure a CloudFormation stack policy to prevent updates and force rollback.
Why wrong: Stack policy protects resources, not rollback.
- D
Use CloudFormation change sets and manually execute them after review.
Why wrong: Manual process does not automate rollback.
Question 1,487 of 1,750
DOP-C02 SDLC Automation Practice Question
This DOP-C02 practice question tests your understanding of sdlc automation. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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 company is using AWS CodePipeline with a deployment stage that uses AWS CloudFormation to deploy infrastructure. The team wants to ensure that if the CloudFormation stack update fails, the pipeline automatically rolls back to the previous version of the stack. Which configuration should the DevOps engineer implement?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
In the CodePipeline CloudFormation deployment action, set 'Stack failure behavior' to 'ROLLBACK'.
Option B is correct because in a CodePipeline CloudFormation deployment action, setting 'Stack failure behavior' to 'ROLLBACK' instructs CloudFormation to automatically roll back the stack to its last known stable state if the update fails. This ensures the pipeline reverts to the previous stack version without manual intervention, aligning with the requirement for automatic rollback on failure.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Configure the CodeDeploy deployment group to automatically roll back on failure.
Why it's wrong here
CodeDeploy is not used for CloudFormation deployments.
- ✓
In the CodePipeline CloudFormation deployment action, set 'Stack failure behavior' to 'ROLLBACK'.
Why this is correct
This configures automatic rollback on stack update failure.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Configure a CloudFormation stack policy to prevent updates and force rollback.
Why it's wrong here
Stack policy protects resources, not rollback.
- ✗
Use CloudFormation change sets and manually execute them after review.
Why it's wrong here
Manual process does not automate rollback.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may confuse CodeDeploy rollback settings with CloudFormation rollback settings, or assume a stack policy or change sets provide automatic rollback, when in fact only the explicit 'Stack failure behavior' parameter in the CodePipeline CloudFormation action controls this behavior.
Detailed technical explanation
How to think about this question
Under the hood, when 'Stack failure behavior' is set to 'ROLLBACK', CloudFormation monitors the stack update for errors; if a failure occurs (e.g., resource creation fails), CloudFormation automatically initiates a rollback to the previous stack template and parameters, preserving the last successful state. This behavior is distinct from the default 'DELETE' behavior, which would delete the stack entirely on failure, and is critical in production pipelines to avoid infrastructure downtime. A real-world scenario is when a misconfigured security group rule causes an update to fail; ROLLBACK ensures the old security group configuration is restored immediately.
KKey Concepts to Remember
- Read the scenario before looking for a memorised answer.
- Find the constraint that changes the correct option.
- Eliminate answers that are true in general but not in this case.
TExam Day Tips
- Watch for words such as best, first, most likely and least administrative effort.
- Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
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
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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FAQ
Questions learners often ask
What does this DOP-C02 question test?
SDLC Automation — This question tests SDLC Automation — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: In the CodePipeline CloudFormation deployment action, set 'Stack failure behavior' to 'ROLLBACK'. — Option B is correct because in a CodePipeline CloudFormation deployment action, setting 'Stack failure behavior' to 'ROLLBACK' instructs CloudFormation to automatically roll back the stack to its last known stable state if the update fails. This ensures the pipeline reverts to the previous stack version without manual intervention, aligning with the requirement for automatic rollback on failure.
What should I do if I get this DOP-C02 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Last reviewed: Jul 4, 2026
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