The correct combination is using CodeCommit pull request approval rules with a CodePipeline manual approval step triggered by a Lambda function that checks approval status. This works because CodeCommit itself lacks native approval workflows, so the pipeline must rely on a Lambda function to verify that the pull request has received the required two approvals before allowing the manual approval gate to proceed. On the AWS Certified DevOps Engineer Professional DOP-C02 exam, this scenario tests your understanding of how to bridge CodeCommit’s pull request approval rules with CodePipeline’s approval actions, often appearing as a trap where candidates mistakenly choose IAM policies or CodeBuild, which cannot enforce manual multi-approver workflows. A common memory tip is “Lambda links PR approvals to pipeline gates”—remember that CodeCommit handles the approval rule, but Lambda is the bridge that tells CodePipeline when the rule is satisfied.
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 engineer is designing a CI/CD pipeline that must enforce a policy: any change to the production branch in CodeCommit must be reviewed and approved by two senior developers before the change can be merged. The pipeline must also automatically build and deploy to a staging environment after approval. Which combination of AWS services and configurations should be used?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use CodeCommit pull request approval rules and a CodePipeline with a manual approval step triggered by a Lambda function that checks approval status
Option C is correct because AWS CodeCommit does not have native approval workflows; however, CodePipeline can use approval actions and CodeCommit can be configured with pull request notifications to trigger pipelines. A Lambda function can be used to automatically approve the pipeline after the required number of approvals in a pull request. Option A is wrong because IAM does not enforce manual approvals. Option B is wrong because CodeBuild does not have approval capabilities. Option D is wrong because CloudWatch Events cannot enforce two-approver rule directly.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
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 CodeBuild to run a script that checks the commit author and rejects if not approved
Why it's wrong here
CodeBuild cannot enforce pull request approvals.
✗
Use Amazon EventBridge to trigger a Lambda function that validates the number of approvers before merging
Why it's wrong here
EventBridge can trigger but cannot enforce the approval workflow directly.
✗
Use IAM policies to restrict write access to the production branch to only senior developers
Why it's wrong here
IAM cannot enforce multi-approval workflow.
✓
Use CodeCommit pull request approval rules and a CodePipeline with a manual approval step triggered by a Lambda function that checks approval status
Why this is correct
This enforces the two-approval requirement and automates staging deployment.
Related concept
Static NAT maps one inside address to one outside address.
Common exam traps
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Detailed technical explanation
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
Static NAT maps one inside address to one outside address.
PAT allows many inside hosts to share one public address using ports.
Inside local and inside global describe the private and translated addresses.
NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
→Identify inside and outside interfaces first.
→Check whether the scenario needs static NAT, dynamic NAT or PAT.
→Do not confuse NAT matching ACLs with normal packet-filtering intent.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
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.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related DOP-C02 NAT questions on configuration and troubleshooting.
SDLC Automation — This question tests SDLC Automation — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Use CodeCommit pull request approval rules and a CodePipeline with a manual approval step triggered by a Lambda function that checks approval status — Option C is correct because AWS CodeCommit does not have native approval workflows; however, CodePipeline can use approval actions and CodeCommit can be configured with pull request notifications to trigger pipelines. A Lambda function can be used to automatically approve the pipeline after the required number of approvals in a pull request. Option A is wrong because IAM does not enforce manual approvals. Option B is wrong because CodeBuild does not have approval capabilities. Option D is wrong because CloudWatch Events cannot enforce two-approver rule directly.
What should I do if I get this DOP-C02 question wrong?
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related DOP-C02 NAT questions on configuration and troubleshooting.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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