Quick Answer
The correct answer is a rolling deployment with rollback in AWS CodeDeploy. This strategy gradually replaces instances in the Auto Scaling group with the new application version, and if any instance fails health checks, CodeDeploy automatically triggers a rollback to the previous working version, ensuring minimal downtime and safe recovery. On the AWS Certified SysOps Administrator Associate SOA-C02 exam, this question tests your understanding of deployment strategies for EC2-based applications, where the key trap is confusing rolling with all-at-once or blue/green—rolling is ideal for gradual, fault-tolerant updates within an existing Auto Scaling group, while all-at-once risks full outage and blue/green swaps entire environments. A simple memory tip: think of rolling as “one tire at a time” with a safety net—if a tire blows, you reverse back to the old set.
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 company needs to deploy a new version of an application to an Auto Scaling group. The deployment must ensure that the new version is deployed to all instances, and if any instance fails, the deployment should roll back. Which deployment strategy should be used?
Blue/green deployment
Why wrong: Blue/green is for replacing entire environments, not gradual within an Auto Scaling group.
Rolling deployment with rollback
Rolling deployment updates instances in batches; rollback reverts changes if failures occur.
All-at-once deployment
Why wrong: All-at-once is risky; if it fails, the entire fleet is affected.
Canary deployment
Why wrong: Canary is for Lambda functions, not Auto Scaling groups.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Rolling deployment with rollback
Option D is correct because CodeDeploy's rolling deployment with rollback allows gradual replacement and automatic rollback on failure. Option A is wrong because all-at-once would replace all instances at once, risking full outage. Option B is wrong because canary is for Lambda. Option C is wrong because blue/green is for full environment swap.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
Blue/green deployment
Why it's wrong here
Blue/green is for replacing entire environments, not gradual within an Auto Scaling group.
Rolling deployment with rollback
Why this is correct
Rolling deployment updates instances in batches; rollback reverts changes if failures occur.
Related concept
Read the scenario before looking for a memorised answer.
All-at-once deployment
Why it's wrong here
All-at-once is risky; if it fails, the entire fleet is affected.
Canary deployment
Why it's wrong here
Canary is for Lambda functions, not Auto Scaling groups.
Common exam traps
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
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.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
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
Identify which SOA-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.
Deployment, Provisioning, and Automation — study guide chapter
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FAQ
Deployment, Provisioning, and Automation — This question tests Deployment, Provisioning, and Automation — Read the scenario before looking for a memorised answer..
The correct answer is: Rolling deployment with rollback — Option D is correct because CodeDeploy's rolling deployment with rollback allows gradual replacement and automatic rollback on failure. Option A is wrong because all-at-once would replace all instances at once, risking full outage. Option B is wrong because canary is for Lambda. Option C is wrong because blue/green is for full environment swap.
Identify which SOA-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.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 20, 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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