DVA-C02 (Page 16)

A developer is leveraging a Border Gateway Protocol (BGP)-based AWS VPN connection to connect from on-premises to Amazon EC2 instances in the developer’s account.The developer is able to access an EC2 instance in subnet A, but is unable to access an EC2 instance in subnet B in the same VPC.Which logs can the developer use to verify whether the traffic is reaching subnet B?Read More →

A developer is deploying a new application to Amazon Elastic Container Service (Amazon ECS).The developer needs to securely store and retrieve different types of variables.These variables include authentication information for a remote API, the URL for the API, and credentials.The authentication information and API URL must be available to all current and future deployed versions of the application across development, testing, and production environments.How should the developer retrieve the variables with the FEWEST application changes?Read More →

A company receives food orders from multiple partners.The company has a microservices application that uses Amazon API Gateway APIs with AWS Lambda integration.Each partner sends orders by calling a customized API that is exposed through API Gateway.The API call invokes a shared Lambda function to process the orders.Partners need to be notified after the Lambda function processes the orders.Each partner must receive updates for only the partner’s own orders.The company wants to add new partners in the future with the fewest code changes possible.Which solution will meet these requirements in the MOST scalable way?Read More →

A developer needs to implement a custom machine learning (ML) library in an application.The size of the library is 15 GB.The size of the library is increasing.The application uses AWS Lambda functions.All the Lambda functions must have access to the library.Which solution will meet these requirements?Read More →

A developer is trying to get data from an Amazon DynamoDB table called demoman-table.The developer configured the AWS CLI to use a specific IAM user’s credentials and ran the following command:aws dynamodb get-item –table-name demoman-table –key ‘{“id”: {“N”:”1993″}}’The command returned errors and no rows were returned.What is the MOST likely cause of these issues?Read More →

A company has multiple Amazon VPC endpoints in the same VPC.A developer needs to configure an Amazon S3 bucket policy so users can access an S3 bucket only by using these VPC endpoints.Which solution will meet these requirements?Read More →

A company runs an application on AWS.The application uses an AWS Lambda function that is configured with an Amazon Simple Queue Service (Amazon SQS) queue called high priority queue as the event source.A developer is updating the Lambda function with another SQS queue called low priority queue as the event source.The Lambda function must always read up to 10 simultaneous messages from the high priority queue before processing messages from low priority queue.The Lambda function must be limited to 100 simultaneous invocations.Which solution will meet these requirements?Read More →

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 UI 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 UI team reports that the request to process a file is often returning timeout errors because of the size or complexity of the files.The UI team wants the API to provide an immediate response so that the UI can display 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?Read More →

A developer has been asked to create an AWS Lambda function that is invoked any time updates are made to items in an Amazon DynamoDB table.The function has been created, and appropriate permissions have been added to the Lambda execution role.Amazon DynamoDB streams have been enabled for the table, but the function is still not being invoked.Which option would enable DynamoDB table updates to invoke the Lambda function?Read More →

A developer needs to deploy an application running on AWS Fargate using Amazon ECS.The application has environment variables that must be passed to a container for the application to initialize.How should the environment variables be passed to the container?Read More →