Which solution will meet these requirements?
Create API Gateway resources and set the integration type value to MOCK. Configure the method integration request and integration response to associate a response with an HTTP status code. Create an API Gateway stage and deploy the API.
Create an AWS Lambda function that returns mocked responses and various HTTP status codes. Create API Gateway resources and set the integration type value to AWS_PROXY. Deploy the API.
Create an EC2 application that returns mocked HTTP responses. Create API Gateway resources and set the integration type value to AWS. Create an API Gateway stage and deploy the API.
Create API Gateway resources and set the integration type value set to HTTP_PROXY. Add mapping templates and deploy the API. Create an AWS Lambda layer that returns various HTTP status codes. Associate the Lambda layer with the API deployment.
Explanations:
Setting the integration type to MOCK allows the API Gateway to return predefined responses without requiring a backend. This solution meets the requirement to publish an API without an integrated backend, enabling development to proceed in parallel.
While using an AWS Lambda function to return mocked responses could work, the use of AWS_PROXY integration requires the Lambda function to be deployed and operational, which contradicts the requirement of not having an integrated backend.
Using an EC2 application requires provisioning and managing a server, which is not necessary for mocking API responses. Additionally, it does not align with the requirement to publish an API without an integrated backend, as it requires an operational EC2 instance.
The HTTP_PROXY integration type would need a functioning backend service to route requests to. Furthermore, the use of a Lambda layer is irrelevant to the need for an integrated backend. This does not fulfill the requirement of publishing an API without an integrated backend.
To the best of my knowledge, the answer is:
Create API Gateway resources and set the integration type value to MOCK. Configure the method integration request and integration response to associate a response with an HTTP status code. Create an API Gateway stage and deploy the API.