The answer is that the IAM role used by CodePipeline lacks the s3:PutObject permission on the bucket. This is the most likely cause because when CodePipeline deploys to an S3 bucket, it assumes an IAM role to perform actions on your behalf; if that role does not include s3:PutObject for the target bucket, the API call to upload objects is denied, even if the bucket policy is permissive. On the AWS Certified Solutions Architect Professional SAP-C02 exam, this scenario tests your understanding of how service roles interact with resource-based policies—a common trap is assuming a bucket policy is the culprit when, in fact, the pipeline’s own permissions are insufficient. Remember the principle of least privilege: always check the pipeline’s execution role first before modifying bucket policies. A useful memory trick is “Role before Policy”—the role must explicitly grant the write action, or the pipeline will fail with an Access Denied error.
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 DevOps engineer is troubleshooting an AWS CodePipeline that fails during the Deploy stage. The pipeline deploys a static website to an S3 bucket. The error message indicates 'Access Denied' when putting objects into the bucket. What is the MOST likely cause?
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 IAM role used by CodePipeline lacks s3:PutObject permission on the bucket.
Option A is correct because the pipeline role needs s3:PutObject permission on the bucket. Option B is wrong because S3 bucket policy is not the issue if the pipeline uses a role. Option C is wrong unless the role already has the permission. Option D is wrong because versioning is not required for writes.
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 IAM role used by CodePipeline lacks s3:PutObject permission on the bucket.
Why this is correct
The role needs explicit write permissions to the S3 bucket.
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 S3 bucket policy denies access from the pipeline's AWS account.
Why it's wrong here
The pipeline uses a role in the same account, so account-level denial is unlikely.
✗
The CodeBuild project does not have the necessary environment variables.
Why it's wrong here
Environment variables are not related to S3 permissions.
✗
The S3 bucket does not have versioning enabled.
Why it's wrong here
Versioning is not required for PutObject.
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 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: The IAM role used by CodePipeline lacks s3:PutObject permission on the bucket. — Option A is correct because the pipeline role needs s3:PutObject permission on the bucket. Option B is wrong because S3 bucket policy is not the issue if the pipeline uses a role. Option C is wrong unless the role already has the permission. Option D is wrong because versioning is not required for writes.
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.
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 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.