As a part of modernizing CI/CD processes to deploy Docker containers with Amazon ECS as standard deployment, you must integrate AWS CodeBuild as a step into AWS CodePipeline to provide high availability. At the same time, the source code changes for the Docker image. What are relevant statements true in this case? (Select TWO).

Answer options:

A.Use the Jenkinsfile to describe in AWS CodePipeline the steps to be deployed.
B.Use the imagedefinitions.json file to describe in AWS CodePipeline the container application.
C.Use the Dockerfile to describe in AWS CodeBuild the phases of a Docker image build.
D.Use buildspec.yml file to describe in AWS CodeBuild the phases of a Docker image build.
E.Use buildspec.yml file to describe in Amazon ECS the phases of a Docker image build.

Correct Answers: B, D
AWS CodePipeline job workers for container actions, such as an Amazon ECR source action or Amazon ECS deploy actions, use definitions files to map the image URI and container name to the task definition. Each definition file is a JSON-formatted file used by the action provider. Amazon ECS standard deployments require an imagedefinitions.json file as an input to the deploy action. Also, a buildspec is a collection of build commands and related settings. If you include a buildspec as part of the source code, by default, the buildspec file must be named buildspec.yml and placed in the root of your source directory.
Incorrect Answers:
Option A is incorrect because Jenkinsfile (a text file that contains the definition of a Jenkins Pipeline) is not part of the AWS CodePipeline steps and is also irrelevant for this question.
Option C is incorrect because you can describe the phases of a Docker image build in AWS CodeBuild by using the buildspec.yml file instead of a Dockerfile (a text document that contains all the commands to assemble a Docker image).
Option E is incorrect because the buildspec.yml file does not have anything to do with Amazon ECS.
References:
https://amzn.to/2AgWpJC
https://amzn.to/3dcorob