You are using AWS CodePipeline service to build up a pipeline for a new web application. In the Source stage, the source provider is GitHub, and its output artifact is configured as WebApp. In the Build stage, there are two build actions in parallel and both of them have used AWS CodeBuild as the service provider. For these two build actions, which configurations of input/output artifacts are correct?

Answer options:

A.Build Action 1 (input artifact: WebApp, output artifact:WebAppBuild1); Build Action 2 (input artifact: WebApp2, output artifact:WebAppBuild2)
B.Build Action 1 (input artifact: empty, output artifact:WebAppBuild1); Build Action 2 (input artifact: WebApp2, output artifact:WebAppBuild2)
C.Build Action 1 (input artifact: WebApp, output artifact:WebAppBuild1); Build Action 2 (input artifact: WebApp, output artifact:WebAppBuild2)
D.Build Action 1 (input artifact: WebApp, output artifact:WebAppBuild); Build Action 2 (input artifact: WebApp, output artifact:WebAppBuild)

Correct Answer – C
Refer to
https://docs.aws.amazon.com/codepipeline/latest/userguide/reference-pipeline-structure.html?icmpid=docs_acp_console#input-output-artifacts
for how to set up input/output artifacts of the CodeBuild stage in CodePipeline. One thing to note is that CodeBuild should have at least 1 input artifact:
Option A is incorrect: As there is only 1 output artifact (WebApp) in the Source stage, the input artifact of the Build stage should be exactly the same. So WebApp2 is incorrect.
Option B is incorrect: Because input artifacts of empty and WebApp2 are incorrect.
Option C is CORRECT: Because both input and output artifacts are appropriate.
Option D is incorrect: Because output artifact names must be unique within a pipeline which means the name of WebAppBuild should not be used in both CodeBuild stages.