The answer is to configure the deployment group to roll back when a CloudWatch alarm is triggered. This is correct because CodeDeploy blue/green deployments can integrate directly with CloudWatch alarms to monitor health checks; if the alarm state persists for the specified duration—such as five minutes of failed health checks—CodeDeploy automatically initiates a rollback to the previous environment. On the AWS Certified DevOps Engineer Professional DOP-C02 exam, this concept tests your understanding that simply creating a CloudWatch alarm is insufficient—you must explicitly associate it with the deployment group’s rollback settings. A common trap is confusing Auto Scaling group health checks or built-in timeouts, but CodeDeploy relies on alarms for this logic, not native timers. Remember the mnemonic: “Alarm arms the rollback”—the alarm must be wired into the deployment group to trigger the automatic reversal.
DOP-C02 SDLC Automation Practice Question
This DOP-C02 practice question tests your understanding of sdlc automation. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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 uses AWS CodeDeploy with a blue/green deployment configuration. The engineer wants to automatically roll back the deployment if the new instances fail the health check for 5 minutes. Which setting should the engineer configure?
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 B is correct because CodeDeploy blue/green deployments can automatically roll back based on CloudWatch alarms. Option A is incorrect because creating an alarm alone does not trigger rollback; CodeDeploy must be configured to use it. Option C is incorrect because Auto Scaling group health checks are separate. Option D is incorrect because CodeDeploy does not have a built-in timeout for health checks; it uses alarms.
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.
✗
Create a CloudWatch alarm that monitors the health check endpoint
Why it's wrong here
An alarm alone does not trigger a rollback.
✓
Configure the deployment group to roll back when a CloudWatch alarm is triggered
Why this is correct
CodeDeploy can roll back based on CloudWatch alarms.
Related concept
Read the scenario before looking for a memorised answer.
✗
Set the Auto Scaling group health check grace period to 5 minutes
Why it's wrong here
Auto Scaling health checks are not used by CodeDeploy rollbacks.
✗
Set the deployment configuration's 'timeout' to 5 minutes
Why it's wrong here
CodeDeploy does not have a timeout setting for health checks.
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 B is correct because CodeDeploy blue/green deployments can automatically roll back based on CloudWatch alarms. Option A is incorrect because creating an alarm alone does not trigger rollback; CodeDeploy must be configured to use it. Option C is incorrect because Auto Scaling group health checks are separate. Option D is incorrect because CodeDeploy does not have a built-in timeout for health checks; it uses alarms.
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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Question Discussion
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