Your team is building up some microservice applications using Java. As part of the CI/CD pipeline, AWS CodeBuild is in charge of the build phase and provides Artifacts that are stored in S3. To better manage the build commands, the team manages several buildspec files rather than directly inserts build commands when the build runs. About the usage of buildspec files, which description is INCORRECT?

Answer options:

A.Users can override the default build spec file name such as buildspec_test.yml.
B.The source code can be combined along with the build spec file 
C.There should be only one build spec file for a given build project.
D.Build spec files must be expressed in JSON format.

Correct Answer – D
AWS CodeBuild service has used buildspec files as a collection of build commands and related settings. Its details can be found in https://docs.aws.amazon.com/codebuild/latest/userguide/build-spec-ref.html.
Option A is incorrect: By default, the buildspec file is named as buildspec.yml. However, this file name can be overridden by other names, which can be done by AWS CLI.
Option B is incorrect: Because the buildspec file can be combined with the source code.
Option C is incorrect: Because although the buildspec file name may differ, there must be only 1 file per build project.
Option D is CORRECT: Because YAML format is the only file format supported for build spec files. Buildspec files cannot be in JSON format per AWS latest: https://docs.aws.amazon.com/codebuild/latest/userguide/build-spec-ref.html