You are helping a team to design a new CI/CD pipeline on the AWS platform. The requirement is that the whole pipeline should be managed by an orchestration tool including source control, build and deploy. In the deployment stage, there are different workflow-driven behaviors to be considered so that a state machine engine is needed to handle these actions properly. The pipeline and state machine execution status should be visualized. What two services in combinations can implement this solution? (Select TWO.)

Answer options:

A.Set up AWS CodeStar to manage the whole CI/CD services in AWS. 
B.Configure an AWS CodeDeploy application to process the continuous deployment tasks.
C.Set up an AWS CodePipeline. In its deployment stage, call a Lambda function which is the trigger for the state machine.
D.Configure AWS Step Functions State Machine to process the state transition. Return the running state when being asked.
E.Create an AWS SWF workflow for the state machine execution. Use workflow decider to control the activity steps.

Correct Answer – C, D
When an orchestration tool is required in AWS, the best service to be considered should be CodePipeline as it controls source control, build and deployment in a visualized way.
Option A is incorrect: Because AWS CodeStar is not enough for this case, although it can help manage various services. CodePipeline is required as a centralized CI/CD pipeline tool.
Option B is incorrect: Because AWS CodeDeploy can only deal with the deployment stage. However, source control and build parts are missing.
Option C is CORRECT: Because AWS CodePipeline automates the steps to release the software changes continuously, which is an ideal CI/CD orchestration tool.
Option D is CORRECT: Refer to page 150, Section "Tutorial: Use an AWS Step Functions Invoke Action in a Pipeline" in the link https://docs.aws.amazon.com/codepipeline/latest/userguide/codepipeline-user.pdf
Option E is incorrect: Check the comparison between AWS Step Functions and SWF in
https://aws.amazon.com/step-functions/faqs/.
Basically, AWS Step Functions should be considered for all the new applications as it provides a more productive and agile approach using visualized workflows. If external signals are required as a decider to influence the flow processes, AWF needs to be considered. In this case, AWS Step Functions is more suitable.