DVA-C02 Deployment Practice Question

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

• ✗

  index.js

  Why it's wrong here

  index.js represents the application's core code, which CodeDeploy deploys to the target environment. While issues within the application code itself might cause runtime errors post-deployment, a direct failure during CodeDeploy's lifecycle hooks typically stems from errors in the *scripts* executed during those hooks. These scripts, defined in appspec.yml, are responsible for tasks like installing dependencies, starting services, or running tests, and their failure prevents the deployment from completing successfully, not the application code itself.

• ✓

  appspec.yml

  Why this is correct

  The appspec.yml file is central to AWS CodeDeploy, serving as the deployment specification. It explicitly defines the source files to be deployed, their destination on the target instance, and, critically, the lifecycle event hooks. Within these hooks, the appspec.yml specifies which scripts CodeDeploy should execute at each stage, such as BeforeInstall, AfterInstall, ApplicationStart, and ValidateService. Failures during these script executions directly manifest as lifecycle hook failures, making appspec.yml the primary configuration for managing deployment scripts and their outcomes.

• ✗

  taskdef.json

  Why it's wrong here

  A taskdef.json file defines an Amazon Elastic Container Service (ECS) task definition, specifying container images, CPU, memory, and networking configurations for containerized applications. While CodeDeploy can integrate with ECS to manage deployments of new task definitions, taskdef.json itself does not contain the instructions for CodeDeploy's lifecycle hooks or the scripts executed during those phases. Its purpose is to describe the runtime environment for containers, not the deployment process's operational steps.

• ✗

  buildspec.yml

  Why it's wrong here

  The buildspec.yml file is a configuration file used exclusively by AWS CodeBuild to define the build commands and settings for a project. It specifies the build environment, input artifacts, build commands to run, and output artifacts to generate, such as compiled code or Docker images. This file is entirely separate from CodeDeploy's operational concerns, which focus on deploying already built artifacts to target environments, making buildspec.yml irrelevant to CodeDeploy lifecycle hook failures.

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