The correct answer is to use CodePipeline with CodeDeploy to perform a blue/green deployment on ECS and configure automatic rollback. This approach is effective because CodeDeploy orchestrates the creation of a new green task set alongside the existing blue set, shifts traffic gradually, and monitors deployment health; if the desired count is not met or any health check fails, it automatically triggers a rollback to the stable blue environment. On the AWS Certified Solutions Architect Professional SAP-C02 exam, this scenario tests your understanding of how CodeDeploy integrates with ECS to handle traffic shifting and failure recovery, often appearing as a trap where candidates mistakenly choose manual scaling or simple CodePipeline actions that lack built-in rollback logic. A key memory tip is to remember that CodeDeploy is the only service that provides both the traffic shifting and the automated rollback mechanism for ECS blue/green deployments.
SAP-C02 Continuous Improvement for Existing Solutions Practice Question
This SAP-C02 practice question tests your understanding of continuous improvement for existing solutions. 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 uses AWS CodePipeline to deploy a web application to Amazon ECS. The deployment often fails because the ECS service's desired count is not met during the update. The company wants to implement a blue/green deployment with automated rollback on failure. What is the MOST effective approach?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use CodePipeline with CodeDeploy to perform a blue/green deployment on ECS and configure automatic rollback.
Option D is correct because CodeDeploy with ECS blue/green deployment provides built-in traffic shifting and automated rollback. Option A is wrong because it lacks traffic shifting. Option B is wrong because it does not support blue/green. Option C is wrong because it lacks automated rollback.
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 CodePipeline with a Lambda function to swap target groups and monitor health.
Why it's wrong here
This approach may not have automated rollback.
✗
Use CodeDeploy with an in-place deployment configuration and a manual approval step.
Why it's wrong here
In-place deployment is not blue/green.
✗
Use CodePipeline with ECS rolling update and CloudWatch alarms to trigger rollback.
Why it's wrong here
Rolling update does not support blue/green traffic shifting.
✓
Use CodePipeline with CodeDeploy to perform a blue/green deployment on ECS and configure automatic rollback.
Why this is correct
CodeDeploy natively supports blue/green deployments on ECS with traffic shifting and automatic rollback based on CloudWatch alarms.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
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
How to think about this question
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.
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.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→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 SAP-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.
Continuous Improvement for Existing Solutions — This question tests Continuous Improvement for Existing Solutions — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use CodePipeline with CodeDeploy to perform a blue/green deployment on ECS and configure automatic rollback. — Option D is correct because CodeDeploy with ECS blue/green deployment provides built-in traffic shifting and automated rollback. Option A is wrong because it lacks traffic shifting. Option B is wrong because it does not support blue/green. Option C is wrong because it lacks automated rollback.
What should I do if I get this SAP-C02 question wrong?
Identify which SAP-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.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. A company uses AWS CodePipeline to deploy a microservices application to Amazon ECS Fargate. The pipeline includes stages for source, build, and deploy. The deploy stage uses an ECS service with a blue/green deployment configuration. After a recent update, the deployment fails with the error: 'The service cannot be deployed because the target group is not in a healthy state.' The target group health checks are configured with path '/health', interval 30 seconds, unhealthy threshold 2. The application health endpoint returns 200 OK. What should the company do to resolve this issue?
hard
A.Redeploy the previous version of the application that passed health checks.
✓ B.Modify the target group health check to use path '/' instead of '/health'.
C.Create a new target group with the correct health check path and update the ECS service.
D.SSH into the Fargate container and restart the application.
Why B: Option B is correct because the CodePipeline deploy action uses CodeDeploy for blue/green deployments. The error indicates that the original target group (blue) is not healthy, possibly because the health check path is not valid for the original application version. Adjusting the health check to a common path like '/' allows both versions to pass. Option A is incorrect because Fargate does not allow SSH. Option C is incorrect because redeploying the same version won't fix the underlying health check issue. Option D is incorrect because a new target group does not address the root cause.
Last reviewed: Jun 20, 2026
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
This SAP-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 SAP-C02 exam.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.