The answer is that the CloudWatch Events rule triggering the pipeline on code push lacks the necessary IAM role to invoke the pipeline. While the developer’s IAM policy correctly grants CodeCommit GitPush and CodePipeline StartPipelineExecution permissions, the push itself only places the code in the repository. The pipeline trigger depends on a separate CloudWatch Events rule configured to detect the push event, and that rule must assume an IAM role with explicit permission to call StartPipelineExecution on the target pipeline. On the AWS Certified Developer Associate DVA-C02 exam, this scenario tests your understanding that event-driven triggers require their own service-linked permissions, distinct from user permissions. A common trap is assuming the developer’s policy covers the entire workflow, but the rule is a separate AWS resource. Memory tip: think of the CloudWatch Events rule as a butler—it needs its own key (IAM role) to open the pipeline door, even if the homeowner (developer) has the key to the house (repository).
DVA-C02 Deployment Practice Question
This DVA-C02 practice question tests your understanding of deployment. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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.
Refer to the exhibit. A developer has the above IAM policy attached. The developer is trying to push code to a CodeCommit repository and trigger a CodePipeline. The push succeeds but the pipeline does not start. What is the most likely reason?
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 CloudWatch Events rule that triggers the pipeline on code push does not have the necessary IAM role to invoke the pipeline.
Option C is correct because the pipeline requires a CloudWatch Events rule to start on code push, and that rule needs permissions to invoke the pipeline. Option A is wrong because the policy allows GitPush. Option B is wrong because the developer has StartPipelineExecution permission. Option D is wrong because the developer can push.
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 developer does not have permissions to push to the repository.
Why it's wrong here
The policy allows GitPush.
✓
The CloudWatch Events rule that triggers the pipeline on code push does not have the necessary IAM role to invoke the pipeline.
Why this is correct
The trigger rule needs permissions to start the pipeline.
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 developer does not have permissions to start the pipeline.
Why it's wrong here
The policy allows StartPipelineExecution on the pipeline.
✗
The CodeCommit repository does not have a trigger configured.
Why it's wrong here
Triggers are configured via CloudWatch Events, not directly on the repo.
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 company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.
What to study next
Got this wrong? Here's your next step.
Identify which DVA-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 — This question tests Deployment — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The CloudWatch Events rule that triggers the pipeline on code push does not have the necessary IAM role to invoke the pipeline. — Option C is correct because the pipeline requires a CloudWatch Events rule to start on code push, and that rule needs permissions to invoke the pipeline. Option A is wrong because the policy allows GitPush. Option B is wrong because the developer has StartPipelineExecution permission. Option D is wrong because the developer can push.
What should I do if I get this DVA-C02 question wrong?
Identify which DVA-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.
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Question Discussion
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