DVA-C02 Lambda Practice Questions

A developer is building an application that uses AWS API Gateway APIs. AWS Lambda function, and AWS Dynamic DB tables. The developer uses the AWS Serverless Application Model (AWS SAM) to build and run serverless applications on AWS. Each time the developer pushes of changes for only to the Lambda functions, all the artifacts in the application are rebuilt. The developer wants to implement AWS SAM Accelerate by running a command to only redeploy the Lambda functions that have changed. Which command will meet these requirements?

• AA. sam deploy -force-upload
• BB. sam deploy -no-execute-changeset
• CC. sam package
• DD. sam sync -watch

A company is offering APIs as a service over the internet to provide unauthenticated read access to statistical information that is updated daily. The company uses Amazon API Gateway and AWS Lambda to develop the APIs. The service has become popular, and the company wants to enhance the responsiveness of the APIs. Which action can help the company achieve this goal?

• AA. Enable API caching in API Gateway.
• BB. Configure API Gateway to use an interface VPC endpoint.
• CC. Enable cross-origin resource sharing (CORS) for the APIs.
• DD. Configure usage plans and API keys in API Gateway.

A developer at a company recently created a serverless application to process and show data from business reports. The application's user interface (UI) allows users to select and start processing the files. The Ul displays a message when the result is available to view. The application uses AWS Step Functions with AWS Lambda functions to process the files. The developer used Amazon API Gateway and Lambda functions to create an API to support the UI. The company's Ul team reports that the request to process a file is often returning timeout errors because of the see or complexity of the files. The Ul team wants the API to provide an immediate response so that the Ul can deploy a message while the files are being processed. The backend process that is invoked by the API needs to send an email message when the report processing is complete. What should the developer do to configure the API to meet these requirements?

• AA. Change the API Gateway route to add an X-Amz-Invocation-Type header win a sialic value of 'Event' in the integration request Deploy the API Gateway stage to apply the changes.
• BB. Change the configuration of the Lambda function that implements the request to process a file. Configure the maximum age of the event so that the Lambda function will ion asynchronously.
• CC. Change the API Gateway timeout value to match the Lambda function ominous value. Deploy the API Gateway stage to apply the changes.
• DD. Change the API Gateway route to add an X-Amz-Target header with a static value of 'A sync' in the integration request Deploy me API Gateway stage to apply the changes.

A developer is optimizing an AWS Lambda function and wants to test the changes in production on a small percentage of all traffic. The Lambda function serves requests to a REST API in Amazon API Gateway. The developer needs to deploy their changes and perform a test in production without changing the API Gateway URL. Which solution will meet these requirements?

• AA. Define a function version for the currently deployed production Lambda function. Update the API Gateway endpoint to reference the new Lambda function version. Upload and publish the optimized Lambda function code. On the production API Gateway stage, define a canary release and set the percentage of traffic to direct to the canary release. Update the API Gateway endpoint to use the $LATEST version of the Lambda function. Publish the API to the canary stage.
• BB. Define a function version for the currently deployed production Lambda function. Update the API Gateway endpoint to reference the new Lambda function version. Upload and publish the optimized Lambda function code. Update the API Gateway endpoint to use the $LATEST version of the Lambda function. Deploy a new API Gateway stage.
• CC. Define an alias on the $LATEST version of the Lambda function. Update the API Gateway endpoint to reference the new Lambda function alias. Upload and publish the optimized Lambda function code. On the production API Gateway stage, define a canary release and set the percentage of traffic to direct to the canary release. Update the API Gateway endpoint to use the SLAT EST version of the Lambda function. Publish to the canary stage.
• DD. Define a function version for the currently deployed production Lambda function. Update the API Gateway endpoint to reference the new Lambda function version. Upload and publish the optimized Lambda function cod . Update the API Gateway endpoint to use the$LATEST version of the Lambda functio . Deploy the API to the production API Gateway stage.