The answer is to increase the original revision timeout in the CodeDeploy deployment group. This is the most likely cause because during a blue/green deployment, CodeDeploy launches new instances in the replacement environment and waits for them to pass health checks before terminating the original instances; if the original revision timeout is set too low, the deployment fails when the Auto Scaling group takes longer than expected to register new instances as healthy. On the AWS Certified DevOps Engineer Professional DOP-C02 exam, this question tests your understanding of CodeDeploy lifecycle hooks and how timeouts specifically affect the deploy stage in CodePipeline, not the build or source stages. A common trap is confusing this timeout with CodeBuild timeout or assuming CloudFormation is involved, but the key is that blue/green deployments rely on instance health validation. Remember the mnemonic: "Blue/Green waits for green, so raise the original scene" — always check the original revision timeout when troubleshooting intermittent deploy failures.
DOP-C02 SDLC Automation Practice Question
This DOP-C02 practice question tests your understanding of sdlc 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 DevOps team is using AWS CodePipeline to automate build, test, and deploy phases. The team notices that the pipeline is failing intermittently during the deploy stage due to a timeout when updating an Auto Scaling group. The deploy stage uses CodeDeploy with a blue/green deployment configuration. What is the MOST likely cause and solution?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The CodeDeploy deployment group has a low original revision timeout. Increase the original revision timeout.
Option C is correct because the blue/green deployment typically waits for instances to be healthy before completing. Option A is wrong because CodeBuild timeout affects build stage, not deploy. Option B is wrong because CodeCommit is the source stage. Option D is wrong because CloudFormation is not used in this deploy stage.
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.
✗
The CloudFormation stack update is failing. Update the stack with a longer timeout.
Why it's wrong here
CloudFormation is not mentioned in the deploy stage.
✗
The CodeCommit repository has too many branches. Clean up unused branches.
Why it's wrong here
Number of branches does not cause deploy timeouts.
✓
The CodeDeploy deployment group has a low original revision timeout. Increase the original revision timeout.
Why this is correct
Blue/green deployment waits for new instances to be healthy; increasing timeout allows more time.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
The CodeBuild project has a low build timeout. Increase the build timeout.
Why it's wrong here
Build timeout is irrelevant to deploy stage failures.
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 DOP-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.
SDLC Automation — This question tests SDLC Automation — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The CodeDeploy deployment group has a low original revision timeout. Increase the original revision timeout. — Option C is correct because the blue/green deployment typically waits for instances to be healthy before completing. Option A is wrong because CodeBuild timeout affects build stage, not deploy. Option B is wrong because CodeCommit is the source stage. Option D is wrong because CloudFormation is not used in this deploy stage.
What should I do if I get this DOP-C02 question wrong?
Identify which DOP-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.
Are there clue words in this question I should notice?
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
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 →
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 DOP-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 DOP-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.