You are working on a proof of concept serverless project and presenting it to the shareholders in a week. This project needs an API gateway, a Lambda function, and a DynamoDB table to store user data. To save time, you plan to use AWS Serverless Application Model (AWS SAM) as it provides templates to deploy all required resources quickly. You have found that SAM templates are very similar to CloudFormation templates. However, which resource types are specially introduced by the SAM template? (Select TWO.)

Answer options:

A.AWS::DynamoDB::Table
B.AWS::Serverless::Api
C.AWS::Lambda::Api
D.AWS::Serverless::Function
E.AWS::ApiGateway::RestApi

Correct Answer – B, D
AWS SAM is an extension of AWS CloudFormation. A SAM serverless application is defined in a CloudFormation template and deployed as a CloudFormation stack. The AWS SAM template can be regarded as a CloudFormation template. However, it has its own special resources. Check https://github.com/awslabs/serverless-application-model/blob/master/versions/2016-10-31.md#awsserverlessapplication for details.
Note: to include objects defined by AWS SAM, the template must include a Transform section in the document with a value of AWS::Serverless-2016-10-31.
Option A is incorrect: Because AWS::DynamoDB::Table is not SAM special and belongs to the CloudFormation resource type.
Option B is CORRECT: Because AWS::Serverless::Api is designed for API gateway resource in the SAM framework.
Option C is incorrect: Similar to
Option A.Option D is CORRECT: Because AWS::Serverless::Function is the SAM resource that creates a Lambda function, IAM execution role, and event source mappings.
Option E is incorrect: Because AWS::ApiGateway::RestApi also belongs to the CloudFormation resource type. Refer to https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-apigateway-restapi.html.