The answer is the deployment group alarm configuration. This CodeDeploy feature allows you to attach Amazon CloudWatch alarms directly to a deployment group, and if any specified alarm enters the ALARM state during a deployment, CodeDeploy automatically triggers a rollback to the last known good revision. This is the correct mechanism because it provides policy-driven, automated rollback based on real-time metrics like error rates or latency, without requiring manual intervention. On the AWS Certified Developer Associate DVA-C02 exam, this concept tests your understanding of how to integrate monitoring with deployment automation; a common trap is confusing this with a simple deployment group configuration or a lifecycle hook. Remember that the alarm is configured at the deployment group level, not the application level. Memory tip: think "Alarm at the Group" — if the alarm goes off, the group rolls back.
DVA-C02 Deployment Practice Question
This DVA-C02 practice question tests your understanding of deployment. 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. A key principle to apply: cloudWatch alarms are configured at the CodeDeploy deployment group level.. 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 EC2 Auto Scaling group. The developer wants to monitor the deployment and automatically roll back if a specified Amazon CloudWatch alarm is triggered during the deployment. Which CodeDeploy feature should the developer configure?
Correct. You add a CloudWatch alarm to the deployment group, and set the rollback behavior to trigger when the alarm enters the ALARM state.
B
Deployment configuration with alarm
Why wrong: There is no such object in CodeDeploy. Alarms are attached to deployment groups, not deployment configurations.
C
Revision rollback
Why wrong: Revision rollback is a feature for rolling back to a previous application revision, but it is not automatically triggered by CloudWatch alarms.
D
EC2 instance health check
Why wrong: Instance health checks are used by the deployment group to determine instance health, but they do not trigger rollbacks based on CloudWatch alarms.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Deployment group alarm configuration
The Deployment group alarm configuration in AWS CodeDeploy allows you to specify Amazon CloudWatch alarms that, when triggered during a deployment, automatically initiate a rollback. This feature is configured at the deployment group level and ensures that if a predefined alarm (e.g., high error rate or latency) enters the ALARM state, CodeDeploy stops the deployment and reverts to the last known good revision. This provides automated, policy-driven rollback without manual intervention.
Key principle: CloudWatch alarms are configured at the CodeDeploy deployment group level.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✓
Deployment group alarm configuration
Why this is correct
Correct. You add a CloudWatch alarm to the deployment group, and set the rollback behavior to trigger when the alarm enters the ALARM state.
Related concept
CloudWatch alarms are configured at the CodeDeploy deployment group level.
✗
Deployment configuration with alarm
Why it's wrong here
There is no such object in CodeDeploy. Alarms are attached to deployment groups, not deployment configurations.
✗
Revision rollback
Why it's wrong here
Revision rollback is a feature for rolling back to a previous application revision, but it is not automatically triggered by CloudWatch alarms.
✗
EC2 instance health check
Why it's wrong here
Instance health checks are used by the deployment group to determine instance health, but they do not trigger rollbacks based on CloudWatch alarms.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates confuse the deployment group alarm configuration (which monitors CloudWatch alarms during deployment) with a deployment configuration (which controls traffic shifting and failure thresholds), leading them to select Option B instead of A.
Detailed technical explanation
How to think about this question
Under the hood, CodeDeploy integrates with CloudWatch via the deployment group's alarm configuration, where you specify up to 10 alarms. When any of these alarms enters the ALARM state during a deployment, CodeDeploy automatically triggers a rollback to the previous successful revision, even if the deployment is still in progress. This is particularly useful in canary or linear deployments where partial traffic shifts can expose issues; the alarm acts as a safety net, and CodeDeploy respects the alarm's evaluation period and datapoints settings to avoid false positives.
KKey Concepts to Remember
CloudWatch alarms are configured at the CodeDeploy deployment group level.
They enable automatic rollback of a deployment if an alarm enters the ALARM state.
Multiple CloudWatch alarms can be associated with a single deployment group.
Rollback behavior is defined when configuring the alarm within the deployment group.
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
CloudWatch alarms are configured at the CodeDeploy deployment group level.
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. CloudWatch alarms are configured at the CodeDeploy deployment group level. 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.
Review cloudWatch alarms are configured at the CodeDeploy deployment group level., then practise related DVA-C02 questions on the same topic to reinforce the concept.
Deployment — This question tests Deployment — CloudWatch alarms are configured at the CodeDeploy deployment group level..
What is the correct answer to this question?
The correct answer is: Deployment group alarm configuration — The Deployment group alarm configuration in AWS CodeDeploy allows you to specify Amazon CloudWatch alarms that, when triggered during a deployment, automatically initiate a rollback. This feature is configured at the deployment group level and ensures that if a predefined alarm (e.g., high error rate or latency) enters the ALARM state, CodeDeploy stops the deployment and reverts to the last known good revision. This provides automated, policy-driven rollback without manual intervention.
What should I do if I get this DVA-C02 question wrong?
Review cloudWatch alarms are configured at the CodeDeploy deployment group level., then practise related DVA-C02 questions on the same topic to reinforce the concept.
What is the key concept behind this question?
CloudWatch alarms are configured at the CodeDeploy deployment group level.
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