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CI/CD Pipelines Flashcards

7 cards from real AWS practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 CI/CD Pipelines flashcards as text

  1. A company wants to implement canary deployments for an AWS Lambda function through CodeDeploy. Which deployment preference type should they configure?

    Answer: Canary

    The Canary deployment preference in CodeDeploy shifts a small percentage of traffic to the new Lambda version first, then shifts the remainder after a validation interval.

  2. What does the 'transition disabled' state on a CodePipeline stage mean?

    Answer: Artifacts cannot pass from the previous stage into this stage until the transition is re-enabled

    Disabling a stage transition prevents new executions from entering that stage while allowing in-progress executions to complete, useful for freeze windows.

  3. A CodeBuild project needs access to resources inside a private VPC. Which configuration is required?

    Answer: Configure VPC settings (VPC ID, subnets, security groups) in the CodeBuild project

    CodeBuild can be configured with a VPC, subnets, and security groups so build containers are placed inside the VPC and can reach private resources.

  4. Which AWS CodePipeline source action type natively supports triggering on a pull request event from a GitHub repository?

    Answer: CodeStarSourceConnection action (GitHub version 2)

    The CodeStarSourceConnection action (GitHub version 2) uses AWS CodeStar Connections and supports pull request triggers as well as push events.

  5. A team wants to enforce that unit tests must pass before the Docker image is pushed to ECR in CodeBuild. How should they order the buildspec phases?

    Answer: pre_build → build → post_build, with tests in build and push in post_build

    Best practice is to run tests in the build phase and push artifacts (like Docker images to ECR) in post_build, so a test failure stops the pipeline before the push.

  6. Which resource allows AWS CodeDeploy to identify the set of EC2 instances that should receive a deployment?

    Answer: CodeDeploy Deployment Group

    A CodeDeploy Deployment Group defines the target instances (via tags, Auto Scaling groups, or on-premises instances) for a deployment.

  7. A DevOps engineer needs to roll back a failed CodeDeploy deployment on EC2 instances automatically. What setting enables this?

    Answer: Configure 'Automatic rollback on deployment failure' in the deployment group settings

    CodeDeploy deployment groups have a built-in automatic rollback option that triggers a new deployment of the last successful revision when a deployment fails.