The correct answer is to add the s3:PutObject permission to the CodePipeline service role. This error occurs because the deploy stage in CodePipeline uses its own service role to interact with the S3 bucket, and when that role lacks the specific permission to upload artifacts, the pipeline fails with an Access Denied error despite the build stage succeeding. On the AWS Certified DevOps Engineer Professional DOP-C02 exam, this scenario tests your understanding of IAM role boundaries across pipeline stages—a common trap is confusing the CodeBuild service role with the CodePipeline service role, as each stage operates under a different principal. Remember that the deploy stage’s action is performed by the pipeline itself, not by the build project, so the fix must target the pipeline’s role. A useful memory tip: “Pipeline puts, Build builds”—the pipeline role needs PutObject for the deploy stage, while the build role handles compilation.
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 uses AWS CodePipeline to deploy a static website to an Amazon S3 bucket. The pipeline has a source stage (CodeCommit), a build stage (CodeBuild that runs a build tool), and a deploy stage (S3). After a recent code change, the build stage succeeded but the deploy stage failed with the error: 'Access Denied' when uploading artifacts to the S3 bucket. What should the team do to fix the issue?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Add 's3:PutObject' permission to the CodePipeline service role
Option C is correct because the CodePipeline service role needs permissions to put objects into the S3 bucket. The error indicates the role used by CodePipeline lacks s3:PutObject permission. Option A is wrong because the build project role is for build, not deploy. Option B is wrong because the error is about the deploy stage, not the source stage. Option D is wrong because bucket policy is not the typical issue if the role exists.
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.
✗
Configure the S3 bucket to allow public access
Why it's wrong here
Public access is not required and is insecure.
✓
Add 's3:PutObject' permission to the CodePipeline service role
Why this is correct
The pipeline role needs S3 write access for the deploy stage.
Related concept
Read the scenario before looking for a memorised answer.
✗
Add an S3 bucket policy that grants the CodeBuild service role s3:PutObject access
Why it's wrong here
The deploy stage uses the pipeline role, not the build role.
✗
Verify that the CodeCommit repository has the correct permissions for the pipeline
Why it's wrong here
The source stage succeeded, so CodeCommit permissions are fine.
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 media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
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: Add 's3:PutObject' permission to the CodePipeline service role — Option C is correct because the CodePipeline service role needs permissions to put objects into the S3 bucket. The error indicates the role used by CodePipeline lacks s3:PutObject permission. Option A is wrong because the build project role is for build, not deploy. Option B is wrong because the error is about the deploy stage, not the source stage. Option D is wrong because bucket policy is not the typical issue if the role exists.
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.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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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
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