- A
Use a CloudWatch Events rule to trigger a rollback when a deployment fails
Why wrong: CloudWatch Events can trigger Lambda, but CodeDeploy has built-in rollback.
- B
Attach an IAM policy to the CodeDeploy service role that allows rollback actions
Why wrong: Permissions are needed but do not automatically trigger rollback.
- C
Specify a rollback revision in the AppSpec file
Why wrong: The AppSpec file does not define rollback configuration.
- D
Configure the deployment group to automatically roll back when a deployment fails
CodeDeploy can automatically roll back on failure.
- E
Configure the deployment group to automatically roll back when a CloudWatch alarm is triggered
Alarms can indicate issues and trigger rollback.
Question 1,376 of 1,750
How to Automatically Roll Back a Failed CodeDeploy Deployment
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.
Which TWO approaches can be used to automatically roll back a failed deployment in AWS CodeDeploy? (Choose two.)
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
✓
Configure the deployment group to automatically roll back when a deployment fails
Option D is correct because AWS CodeDeploy allows you to configure a deployment group to automatically roll back a deployment when it fails. This is a native feature that can be enabled in the deployment group settings, ensuring that if a deployment fails (e.g., due to health check failures or script errors), CodeDeploy automatically reverts to the last known good revision without manual intervention.
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 a CloudWatch Events rule to trigger a rollback when a deployment fails
Why it's wrong here
CloudWatch Events can trigger Lambda, but CodeDeploy has built-in rollback.
- ✗
Attach an IAM policy to the CodeDeploy service role that allows rollback actions
Why it's wrong here
Permissions are needed but do not automatically trigger rollback.
- ✗
Specify a rollback revision in the AppSpec file
Why it's wrong here
The AppSpec file does not define rollback configuration.
- ✓
Configure the deployment group to automatically roll back when a deployment fails
Why this is correct
CodeDeploy can automatically roll back on failure.
Related concept
Read the scenario before looking for a memorised answer.
- ✓
Configure the deployment group to automatically roll back when a CloudWatch alarm is triggered
Why this is correct
Alarms can indicate issues and trigger rollback.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse CloudWatch Events rules with direct rollback triggers, but CloudWatch Events can only invoke actions like notifications or Lambda functions, not native CodeDeploy rollbacks, which require explicit configuration in the deployment group.
Detailed technical explanation
How to think about this question
CodeDeploy's automatic rollback feature works by monitoring deployment events such as deployment failure or CloudWatch alarm states. When enabled, CodeDeploy stores the last successful deployment revision and, upon failure, redeploys that revision using the same deployment configuration. This is particularly useful in blue/green deployments where a failed deployment can leave the environment in an inconsistent state, and automatic rollback ensures rapid recovery without manual re-deployment.
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 company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.
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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SDLC Automation — study guide chapter
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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: Configure the deployment group to automatically roll back when a deployment fails — Option D is correct because AWS CodeDeploy allows you to configure a deployment group to automatically roll back a deployment when it fails. This is a native feature that can be enabled in the deployment group settings, ensuring that if a deployment fails (e.g., due to health check failures or script errors), CodeDeploy automatically reverts to the last known good revision without manual intervention.
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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