Exam AWS Certified Developer Associate topic 1 question 57 discussion

i vote B With the Lambda proxy integration, Lambda is required to return an output of the following format ... In this output, statusCode is typically 4XX for a client error and 5XX for a server error. API Gateway handles these errors by mapping the Lambda error to an HTTP error response, according to the specified statusCode. For API Gateway to pass the error type (for example, InvalidParameterException), as part of the response to the client, the Lambda function must include a header (for example, "X-Amzn-ErrorType":"InvalidParameterException") in the headers property.

I'll go with "D" - https://docs.aws.amazon.com/apigateway/latest/developerguide/handle-errors-in-lambda-integration.html

B) Correct With Lambda proxy integration enabled, the Lambda function must return a JSON object with the following structure: { "statusCode": 400, "headers": { "Content-Type": "application/json" }, "body": "{\"message\": \"Invalid request\"}" } If the statusCode is omitted or incorrectly set, API Gateway defaults to returning a 200 status code.

Lambda proxy integration can return the correct error message. A can not be the answer as CORS is not involved in a direct call

Answer is B, see on this link: https://docs.aws.amazon.com/apigateway/latest/developerguide/handle-errors-in-lambda-integration.html "With the Lambda proxy integration, Lambda is required to return an output of the following format:"

B. Use a Lambda proxy integration to return HTTP codes and headers. When using a Lambda proxy integration, the Lambda function can return an HTTP status code and headers directly to the API Gateway, which then passes it on to the client. This is in contrast to a standard integration, where the Lambda function returns only the body of the response, and the API Gateway itself handles the HTTP status code and headers. Therefore, using a Lambda proxy integration can help resolve this issue and ensure that the appropriate HTTP status code is returned through the API Gateway.

B should be the answer.

4xx is client side error, hence CORS

B correct

Answer is B https://docs.aws.amazon.com/apigateway/latest/developerguide/handle-errors-in-lambda-integration.html

https://docs.aws.amazon.com/apigateway/latest/developerguide/handle-errors-in-lambda-integration.html

This is B https://docs.aws.amazon.com/apigateway/latest/developerguide/handle-errors-in-lambda-integration.html

"For Lambda custom integrations, you must map errors returned by Lambda in the integration response to standard HTTP error responses for your clients. Otherwise, Lambda errors are returned as 200 OK responses by default and the result is not intuitive for your API users." https://docs.aws.amazon.com/apigateway/latest/developerguide/handle-errors-in-lambda-integration.html

B. https://stackoverflow.com/questions/31329495/is-there-a-way-to-change-the-http-status-codes-returned-by-amazon-api-gateway

D is the correct answer