- A
Set the deployment type to in-place.
Why wrong: In-place deployments update existing tasks and are not used for blue/green deployments on ECS. This does not enable automatic rollback on health check failures.
- B
Enable rollback in the deployment group settings.
Correct. Configuring the deployment group to roll back on health check failures triggers an automatic rollback when the new task set fails health checks.
- C
Set the deployment configuration to CodeDeployDefault.OneAtATime.
Why wrong: This deployment configuration is for EC2/On-Premises deployments, not ECS. It controls the pace of traffic shifting, not automatic rollback.
- D
Configure CloudWatch alarms to trigger a rollback.
Why wrong: CloudWatch alarms can trigger rollbacks, but the question specifically asks for automatic rollback on health check failure. The deployment group setting directly handles this.
DVA-C02 Deployment Practice Question
This DVA-C02 practice question tests your understanding of deployment. 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 developer is using AWS CodeDeploy to deploy an application to an Amazon ECS service using the Fargate launch type. The developer wants to ensure that the deployment rolls back automatically if the new task set fails health checks. Which configuration should the developer set?
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
Enable rollback in the deployment group settings.
Option B is correct because enabling rollback in the deployment group settings allows CodeDeploy to automatically revert the deployment to the previous working task set if the new task set fails health checks. This is a native feature of CodeDeploy that monitors the health of the ECS service and triggers a rollback 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.
- ✗
Set the deployment type to in-place.
Why it's wrong here
In-place deployments update existing tasks and are not used for blue/green deployments on ECS. This does not enable automatic rollback on health check failures.
- ✓
Enable rollback in the deployment group settings.
Why this is correct
Correct. Configuring the deployment group to roll back on health check failures triggers an automatic rollback when the new task set fails health checks.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Set the deployment configuration to CodeDeployDefault.OneAtATime.
Why it's wrong here
This deployment configuration is for EC2/On-Premises deployments, not ECS. It controls the pace of traffic shifting, not automatic rollback.
- ✗
Configure CloudWatch alarms to trigger a rollback.
Why it's wrong here
CloudWatch alarms can trigger rollbacks, but the question specifically asks for automatic rollback on health check failure. The deployment group setting directly handles this.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse CloudWatch alarms as the only way to trigger a rollback, but CodeDeploy's built-in rollback feature directly responds to health check failures without needing an alarm.
Detailed technical explanation
How to think about this question
Under the hood, CodeDeploy for ECS blue/green deployments creates a replacement task set and shifts traffic gradually. If the new task set fails the configured health check grace period or the target group health checks, CodeDeploy automatically terminates the new task set and restores traffic to the original task set, provided rollback is enabled. In real-world scenarios, this prevents prolonged downtime by instantly reverting to the stable version when a misconfigured container image or environment variable causes health check failures.
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 DVA-C02 question test?
Deployment — This question tests Deployment — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Enable rollback in the deployment group settings. — Option B is correct because enabling rollback in the deployment group settings allows CodeDeploy to automatically revert the deployment to the previous working task set if the new task set fails health checks. This is a native feature of CodeDeploy that monitors the health of the ECS service and triggers a rollback without manual intervention.
What should I do if I get this DVA-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: Jun 11, 2026
This DVA-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 DVA-C02 exam.
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