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.

• ✓

  Create an IAM service role that allows CodeDeploy to access the instances.

  Why this is correct

  Creating an IAM service role is mandatory because CodeDeploy uses this role to assume permissions to call Amazon EC2 and Auto Scaling APIs, letting it enumerate instances, read tags, and perform deployment actions. Without this role, CodeDeploy cannot even start a deployment or resolve the target instances in the Auto Scaling group, making it a fundamental prerequisite.

• ✗

  Attach an Application Load Balancer to the Auto Scaling group.

  Why it's wrong here

  Attaching an Application Load Balancer is orthogonal to CodeDeploy's core operation; an ALB is useful for distributing traffic and for blue/green traffic shifting, but CodeDeploy can perform in-place deployments to instances behind either no load balancer or a classic ELB. It does not provide CodeDeploy with any access or deployment capability, so it is optional and not needed to ensure deployments succeed.

• ✗

  Enable the Application Discovery Service for the instances.

  Why it's wrong here

  AWS Application Discovery Service collects metadata from on-premises servers to support migration and modernization planning, which has no connection to the CodeDeploy deployment pipeline. Enabling this service on EC2 instances would not install an agent nor grant CodeDeploy permissions; it simply adds unrelated telemetry and cost, so it cannot help ensure a deployment works.

• ✗

  Configure the deployment to use a blue/green deployment type.

  Why it's wrong here

  Configuring a blue/green deployment type is a valid strategy but not a required action for basic CodeDeploy functionality; the default in-place deployment type works perfectly well with Auto Scaling groups and is often preferred when you want to minimize downtime or when instances are ephemeral. The question asks what must be done to enable deployments, and choosing a deployment type is a configuration choice, not a prerequisite.

• ✓

  Install the CodeDeploy agent on each EC2 instance in the Auto Scaling group.

  Why this is correct

  The CodeDeploy agent must be installed and running on every target EC2 instance because it is the component that polls the CodeDeploy service, downloads the application revision, and executes the deployment lifecycle hooks. Without the agent, the instance never appears as healthy or ready, and the deployment fails or is skipped. For Auto Scaling groups, you should bake the agent into the AMI or install it via user data to handle scale-out events.

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