AWS Certified Solutions Architect – Professional — Question 934

A Development team is deploying new APIs as serverless applications within a company. The team is currently using the AWS Management Console to provision
Amazon API Gateway, AWS Lambda, and Amazon DynamoDB resources. A Solutions Architect has been tasked with automating the future deployments of these serverless APIs.
How can this be accomplished?

Answer options

• A. Use AWS CloudFormation with a Lambda-backed custom resource to provision API Gateway. Use the AWS::DynamoDB::Table and AWS::Lambda::Function resources to create the Amazon DynamoDB table and Lambda functions. Write a script to automate the deployment of the CloudFormation template.
• B. Use the AWS Serverless Application Model to define the resources. Upload a YAML template and application files to the code repository. Use AWS CodePipeline to connect to the code repository and to create an action to build using AWS CodeBuild. Use the AWS CloudFormation deployment provider in CodePipeline to deploy the solution.
• C. Use AWS CloudFormation to define the serverless application. Implement versioning on the Lambda functions and create aliases to point to the versions. When deploying, configure weights to implement shifting traffic to the newest version, and gradually update the weights as traffic moves over.
• D. Commit the application code to the AWS CodeCommit code repository. Use AWS CodePipeline and connect to the CodeCommit code repository. Use AWS CodeBuild to build and deploy the Lambda functions using AWS CodeDeploy. Specify the deployment preference type in CodeDeploy to gradually shift traffic over to the new version.

Correct answer: B

Explanation

AWS Serverless Application Model (AWS SAM) is specifically designed to simplify the definition and deployment of serverless resources like API Gateway, Lambda, and DynamoDB. Integrating AWS SAM with AWS CodePipeline, AWS CodeBuild, and AWS CloudFormation provides a fully automated, native continuous delivery pipeline for serverless architectures. Other options either involve unnecessary manual scripting, lack a complete CI/CD automation pipeline, or fail to account for the deployment of API Gateway and DynamoDB alongside Lambda.