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.
Refer to the exhibit. A developer has the IAM policy shown. The developer can push code to the CodeCommit repository and start the pipeline. However, the pipeline fails at the Source stage with an access denied error. What additional permission is needed?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
codecommit:GitPull
The pipeline fails at the Source stage because CodePipeline needs to pull the source code from CodeCommit to start the build. The `codecommit:GitPull` permission is required for the pipeline's service role to perform a Git pull operation (fetching the repository contents). Without it, the pipeline cannot retrieve the source code, even though the developer has push and pipeline start permissions.
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.
✓
codecommit:GitPull
Why this is correct
CodePipeline needs GitPull to fetch the source code.
Related concept
Read the scenario before looking for a memorised answer.
✗
codecommit:GetBranch
Why it's wrong here
GetBranch is needed but CodePipeline requires GitPull for source.
✗
codecommit:CreateCommit
Why it's wrong here
CreateCommit is for creating commits, not needed for source.
✗
codecommit:UploadArchive
Why it's wrong here
UploadArchive is not a valid CodeCommit action.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates assume `codecommit:GetBranch` is sufficient because it returns the branch's latest commit ID, but they overlook that the pipeline needs to actually read the repository contents (files), not just metadata.
Detailed technical explanation
How to think about this question
Under the hood, CodePipeline uses the Git protocol over HTTPS to clone the repository. The `codecommit:GitPull` permission maps to the `ListObjects` and `GetObject` operations on the S3-backed CodeCommit repository, enabling the pipeline to fetch the commit history and file contents. A real-world scenario where this matters is when using cross-account pipelines: the pipeline role must have explicit `codecommit:GitPull` on the repository ARN, and the repository's resource policy must allow the pipeline's service role.
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.
TExam Day Tips
→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 exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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: codecommit:GitPull — The pipeline fails at the Source stage because CodePipeline needs to pull the source code from CodeCommit to start the build. The `codecommit:GitPull` permission is required for the pipeline's service role to perform a Git pull operation (fetching the repository contents). Without it, the pipeline cannot retrieve the source code, even though the developer has push and pipeline start permissions.
What should I do if I get this DOP-C02 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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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