A company has microservices running in AWS Lambda that read data from Amazon DynamoDB. The Lambda code is manually deployed by developers after successful testing. The company now needs the tests…

Question

Options

• ACreate an AWS CodePipeline configuration and set up a post-commit hook to trigger the pipeline
• BCreate an AWS CodeBuild configuration that triggers when the test code is pushed. Use AWS
• CCreate an AWS CodePipeline configuration and set up the source code step to trigger when code
• DUse the AWS CLI to set up a post-commit hook that uploads the code to an Amazon S3 bucket

• A
  4% (1)
• B
  17% (4)
• C
  74% (17)
• D
  4% (1)

Explanation

Explanation

Option C is correct because AWS CodePipeline provides a fully managed CI/CD pipeline that can automatically trigger when code is committed, orchestrate testing via CodeBuild, deploy via CodeDeploy, and - critically - CodeDeploy supports Lambda traffic shifting strategies (canary, linear, all-at-once) that incrementally shift traffic to new Lambda versions over time, satisfying all requirements while maximizing developer velocity.

Why the distractors are wrong:

• Option A describes a post-commit hook triggering CodePipeline, which is a valid starting point, but this answer is incomplete - it doesn't address traffic shifting or the full automation pipeline needed
• Option B is incomplete as written (cut off), but relying solely on CodeBuild omits the deployment orchestration and traffic shifting capabilities that CodeDeploy provides within a pipeline
• Option D using the AWS CLI with an S3 bucket is a manual, error-prone approach that doesn't provide automated testing, continuous deployment, or incremental traffic shifting - the opposite of developer velocity

Memory Tip

Think "Pipeline = Full Journey" - CodePipeline orchestrates the entire workflow (Source → Build → Test → Deploy), and when combined with CodeDeploy's Lambda traffic shifting, it's the complete AWS-native answer. If a question mentions incremental traffic shifting for Lambda, always think CodeDeploy + CodePipeline.

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