- A
Initiate a rollback from the CodeDeploy console to redeploy the previous working revision.
Rollback automatically deploys the previously successful revision to all instances, restoring the working version.
- B
Stop the deployment immediately; the instances that have already been updated will revert automatically.
Why wrong: Stopping the deployment halts further changes but does not revert instances already updated.
- C
Edit the deployment group settings to pause deployments after a failure, then manually fix the instances.
Why wrong: Pausing does not revert changes; it only prevents further deployments.
- D
Redeploy the same failing revision but with a different deployment configuration.
Why wrong: Redeploying the same buggy revision will not fix the issue; it will continue to fail.
Quick Answer
The correct action is to initiate a rollback from the CodeDeploy console to redeploy the previous working revision. This is because CodeDeploy allows you to perform a manual rollback after a failed deployment, which redeploys the last known good revision to every instance in the deployment group—including the first instance that already received the buggy version. On the AWS Certified SysOps Administrator Associate SOA-C02 exam, this scenario tests your understanding of how CodeDeploy handles partial failures and the difference between automatic and manual rollback triggers. A common trap is thinking you must manually revert the first instance or stop the deployment group, but CodeDeploy’s rollback feature handles the entire group in one action. Remember: when a deployment fails mid-stream, a manual rollback is your single command to restore order—think of it as a “one-click undo” for the entire deployment group.
SOA-C02 Deployment, Provisioning, and Automation Practice Question
This SOA-C02 practice question tests your understanding of deployment, provisioning, and 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.
A SysOps administrator uses AWS CodeDeploy to deploy a new version of an application to an Auto Scaling group. The deployment uses the 'CodeDeployDefault.OneAtATime' deployment configuration. During the deployment, the first instance succeeds, but subsequent instances fail because the new application version has a bug that causes the application health check to fail. The administrator wants to immediately roll back the change and restore the previous working version on all instances. Which action should the administrator take?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"first"Why it matters: Order matters here. You are being tested on which action comes before the others — not which action is generally useful.
Clue:
"immediately / without restart"Why it matters: Time or reboot constraint — the correct answer must take effect right away without requiring a reboot or reload.
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
Initiate a rollback from the CodeDeploy console to redeploy the previous working revision.
Option A is correct because CodeDeploy supports automatic and manual rollbacks to a previous working revision. When a deployment fails, the administrator can initiate a rollback from the CodeDeploy console, which redeploys the last successful revision to all instances in the deployment group, including those that were already updated. This ensures the previous working version is restored across the entire Auto Scaling group.
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.
- ✓
Initiate a rollback from the CodeDeploy console to redeploy the previous working revision.
Why this is correct
Rollback automatically deploys the previously successful revision to all instances, restoring the working version.
Clue confirmation
The clue words "first", "immediately / without restart" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Stop the deployment immediately; the instances that have already been updated will revert automatically.
Why it's wrong here
Stopping the deployment halts further changes but does not revert instances already updated.
- ✗
Edit the deployment group settings to pause deployments after a failure, then manually fix the instances.
Why it's wrong here
Pausing does not revert changes; it only prevents further deployments.
- ✗
Redeploy the same failing revision but with a different deployment configuration.
Why it's wrong here
Redeploying the same buggy revision will not fix the issue; it will continue to fail.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates mistakenly think stopping a deployment automatically reverts instances, but in CodeDeploy, stopping only halts the deployment process without rolling back already-updated instances.
Detailed technical explanation
How to think about this question
CodeDeploy rollbacks work by redeploying the last successful revision stored in the deployment group's revision history. The 'CodeDeployDefault.OneAtATime' configuration deploys to one instance at a time, so when a failure occurs, only some instances may have been updated. A rollback ensures all instances converge to the previous working revision, respecting the deployment group's original configuration and lifecycle hooks. This is critical in Auto Scaling groups where new instances launched after the rollback will also use the previous revision.
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 SOA-C02 question test?
Deployment, Provisioning, and Automation — This question tests Deployment, Provisioning, and Automation — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Initiate a rollback from the CodeDeploy console to redeploy the previous working revision. — Option A is correct because CodeDeploy supports automatic and manual rollbacks to a previous working revision. When a deployment fails, the administrator can initiate a rollback from the CodeDeploy console, which redeploys the last successful revision to all instances in the deployment group, including those that were already updated. This ensures the previous working version is restored across the entire Auto Scaling group.
What should I do if I get this SOA-C02 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Are there clue words in this question I should notice?
Yes — watch for: "first", "immediately / without restart". Order matters here. You are being tested on which action comes before the others — not which action is generally useful.
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 SOA-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 SOA-C02 exam.
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