A group of developers for a startup company store their source code and binary files on a shared open-source repository platform which is publicly accessible over the internet. They have embarked on a new project in which their client requires high confidentiality and security on all development assets. Which AWS service can the developers use to store the source code?

Answer options:

A.AWS CodeCommit
B.AWS CodeDeploy
C.AWS Lambda
D.AWS CodeStar

Correct Answer – A
AWS CodeCommit is a managed source control service. It can be used as a data store to store source code, binaries, scripts, HTML pages and images which are accessible over the internet. CodeCommit encrypts files in transit and at rest, which fulfills the additional client requirement (high confidentiality & security) mentioned in the question. Also, CodeCommit works well with Git tools and other existing CI/CD tools.
https://aws.amazon.com/codecommit/
Option B is INCORRECT because AWS CodeDeploy is a deployment service that automates application deployments to Amazon EC2 instances, on-premises instances, serverless Lambda functions, or Amazon ECS services.
https://docs.aws.amazon.com/codedeploy/latest/userguide/welcome.html
Option C is INCORRECT because AWS Lambda will allow the developers in the scenario to run code without provisioning or managing servers. The company would pay only for the compute time consumed. There would be no charge when your code is not running. 
https://aws.amazon.com/lambda/
Option D is INCORRECT because AWS CodeStar provides a unified user interface, enabling you to manage your software development activities in one place easily. With AWS CodeStar, you can set up your entire continuous delivery toolchain in minutes, allowing you to start releasing code faster. AWS CodeStar makes it easy for your whole team to work together securely, allowing you to manage access and add owners, contributors, and viewers to your projects easily. However, this question asks for the service to store the source code. AWS CodeStar is improper because it is a software development management tool rather than a source control service.
https://aws.amazon.com/codestar/