You are a developer for your company responsible for the development and deployment of AWS Lambda functions. You have been told to start the automated deployment of Lambda based applications. Which of the following collated services can be used for automated deployment? Choose 3 answers from the options given below.

Answer options:

A.AWS API gateway
B.AWS Code Pipeline
C.AWS Code Build
D.AWS Code Deploy

Answer – B, C and D
The AWS Documentation mentions the following.
Automating Deployment of Lambda Applications
In the previous section, you learned how to create a SAM template, generate your deployment package, and use the AWS CLI to deploy your serverless application manually. In this section, you will leverage the following AWS services to automate the deployment process fully.
AWS CodePipeline: You use AWS CodePipeline to model, visualize, and automate the steps required to release your serverless application. For more information, see What is AWS CodePipeline?
AWS CodeBuild: You use AWS CodeBuild to build, locally test, and package your serverless application. For more information, see What is AWS CodeBuild?
AWS CloudFormation: You use AWS CloudFormation to deploy your application. For more information, see What is AWS CloudFormation?
AWS CodeDeploy: You use AWS CodeDeploy to deploy updates to your serverless applications gradually. For more information on how to do this, see Gradual Code Deployment.
Option A is invalid because it can be used in front of the Lambda function but cannot do the automated deployment.
For more information on automating deployment, please refer to the below URL-
https://docs.aws.amazon.com/lambda/latest/dg/automating-deployment.html