The answer is to configure the deployment group to roll back when a CloudWatch alarm is triggered. This is correct because AWS CodeDeploy’s automatic rollback feature can be tied directly to CloudWatch alarms, which monitor health check metrics after a deployment completes; if the alarm state indicates failure, CodeDeploy automatically reverts the deployment to the last known good revision. On the AWS Certified DevOps Engineer Professional DOP-C02 exam, this concept tests your understanding of how to implement fully automated, resilient deployments without manual intervention—a common trap is confusing stopping traffic (which only halts new requests) with a true rollback that restores the previous application version. Remember the key distinction: CloudWatch alarms drive the rollback, not deployment group settings alone. A useful memory tip is “Alarm triggers auto-revert”—if your health checks fail, let the alarm do the heavy lifting.
DOP-C02 SDLC Automation Practice Question
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.
A DevOps engineer is setting up a CI/CD pipeline for a microservices architecture. The team uses AWS CodeCommit, CodeBuild, and CodeDeploy. The engineer needs to ensure that the pipeline can automatically roll back the deployment if the health checks fail after deployment. Which action should the engineer take?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Configure the deployment group to roll back when a CloudWatch alarm is triggered.
Option D is correct because CodeDeploy supports automatic rollback based on CloudWatch alarm triggers. Options A and B are manual steps. Option C only stops traffic, not rollback.
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.
✗
Use AWS Lambda to monitor health checks and trigger a rollback via the CodeDeploy API.
Why it's wrong here
This is complex and not the default mechanism.
✓
Configure the deployment group to roll back when a CloudWatch alarm is triggered.
Why this is correct
CodeDeploy can automatically roll back based on CloudWatch alarms.
Related concept
Read the scenario before looking for a memorised answer.
✗
Set up the deployment group to use blue/green deployment with traffic shifting.
Why it's wrong here
Blue/green alone does not auto-rollback.
✗
Configure the pipeline to have a manual approval step after deployment.
Why it's wrong here
Manual approval does not automate rollback.
Common exam traps
Common exam trap: answer the scenario, not the keyword
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
How to think about this question
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.
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.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→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 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.
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: Configure the deployment group to roll back when a CloudWatch alarm is triggered. — Option D is correct because CodeDeploy supports automatic rollback based on CloudWatch alarm triggers. Options A and B are manual steps. Option C only stops traffic, not rollback.
What should I do if I get this DOP-C02 question wrong?
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.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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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.
Question Discussion
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