DVA-C02 (Page 28)

A developer manages three AWS accounts.Each account contains an Amazon RDS DB instance in a private subnet.The developer needs to define users in each database in a consistent way.The developer must ensure that the same users are created and updated later in all three accounts.Which solution will meet these requirements with the MOST operational efficiency?Read More →

A developer is creating an application that reads and writes to multiple Amazon S3 buckets.The application will be deployed to an Amazon EC2 instance.The developer wants to make secure API requests from the EC2 instances without the need to manage the security credentials for the application.The developer needs to apply the principle of least privilege.Which solution will meet these requirements?Read More →

A developer is migrating an application to Amazon Elastic Kubernetes Service (Amazon EKS).The developer migrates the application to Amazon Elastic Container Registry (Amazon ECR) with an EKS cluster.As part of the application migration to a new backend, the developer creates a new AWS account.The developer makes configuration changes to the application to point the application to the new AWS account and to use new backend resources.The developer successfully tests the changes within the application by deploying the pipeline.The Docker image build and the pipeline deployment are successful, but the application is still connecting to the old backend.The developer finds that the application’s configuration is still referencing the original EKS cluster and not referencing the new backend resources.Which reason can explain why the application is not connecting to the new resources?Read More →

A developer is building an application that will use an Amazon API Gateway API with an AWS Lambda backend.The team that will develop the frontend requires immediate access to the API endpoints to build the UI.To prepare the backend application for integration, the developer needs to set up endpoints.The endpoints need to return predefined HTTP status codes and JSON responses for the frontend team.The developer creates a method for an API resource.Which solution will meet these requirements?Read More →

A developer is building a serverless application that runs on AWS.The developer wants to create an accelerated development workflow that deploys incremental changes to AWS for testing.The developer wants to deploy the incremental changes but does not want to fully deploy the entire application to AWS for every code commit.What should the developer do to meet these requirements?Read More →

A company runs a batch processing application by using AWS Lambda functions and Amazon API Gateway APIs with deployment stages for development, user acceptance testing, and production.A development team needs to configure the APIs in the deployment stages to connect to third-party service endpoints.Which solution will meet this requirement?Read More →

A company’s developer is creating an application that uses Amazon API Gateway.The company wants to ensure that only users in the Sales department can use the application.The users authenticate to the application by using federated credentials from a third-party identity provider (IdP) through Amazon Cognito.The developer has set up an attribute mapping to map an attribute that is named Department and to pass the attribute to a custom AWS Lambda authorizer.To test the access limitation, the developer sets their department to Engineering in the IdP and attempts to log in to the application.The developer is denied access.The developer then updates their department to Sales in the IdP and attempts to log in.Again, the developer is denied access.The developer checks the logs and discovers that access is being denied because the developer’s access token has a department value of Engineering.Which of the following is a possible reason that the developer’s department is still being reported as Engineering instead of Sales?Read More →

A developer has created a data collection application that uses Amazon API Gateway, AWS Lambda, and Amazon S3.The application’s users periodically upload data files and wait for the validation status to be reflected on a processing dashboard.The validation process is complex and time-consuming for large files.Some users are uploading dozens of large files and have to wait and refresh the processing dashboard to see if the files have been validated.The developer must refactor the application to immediately update the validation result on the user’s dashboard without reloading the full dashboard.What is the MOST operationally efficient solution that meets these requirements?Read More →

A company uses AWS CloudFormation to deploy an application that uses an Amazon API Gateway REST API with AWS Lambda function integration.The application uses Amazon DynamoDB for data persistence.The application has three stages: development, testing, and production.Each stage uses its own DynamoDB table.The company has encountered unexpected issues when promoting changes to the production stage.The changes were successful in the development and testing stages.A developer needs to route 20% of the traffic to the new production stage API with the next production release.The developer needs to route the remaining 80% of the traffic to the existing production stage.The solution must minimize the number of errors that any single customer experiences.Which approach should the developer take to meet these requirements?Read More →

An online sales company is developing a serverless application that runs on AWS.The application uses an AWS Lambda function that calculates order success rates and stores the data in an Amazon DynamoDB table.A developer wants an efficient way to invoke the Lambda function every 15 minutes.Which solution will meet this requirement with the LEAST development effort?Read More →