DVA-C01 (Page 17)

A banking application processes thousands of transactions each second.Each transaction payload must have end-to-end encryption.The application encrypts each transaction locally by using the AWS Key Management Service (AWS KMS) GenerateDataKey operation.A developer is testing the application and receives a ThrottlingException error.Which actions are best practices to resolve this error? (Choose two.)Read More →

An ecommerce company wants to redirect users to a country-specific website when they enter the example.com website.For example, the company wants to redirect United States users to example.com/us/ and wants to redirect French users to example.com/fr/.The web application is using Amazon CloudFront and anApplication Load Balancer with an Amazon Elastic Container Service (Amazon ECS) cluster.The application’s domain name resolution is configured in anAmazon Route 53 public hosted zone.Which solution will meet these requirements with the LEAST operational effort?Read More →

A development team uses AWS Elastic Beanstalk for application deployment.The development team has configured the application version lifecycle policy to limit the number of application versions to 25.However, even with the application version lifecycle policy, the source bundle is deleted from the Amazon S3 source bucket.What should the development team do in the Elastic Beanstalk application version lifecycle settings to retain the source code in the S3 bucket?Read More →

A global company has a mobile app with static data stored in an Amazon S3 bucket in the us-east-1 Region.The company serves the content through an AmazonCloudFront distribution.The company is launching the mobile app in South Africa.The data must reside in the af-south-1 Region.The company does not want to deploy a specific mobile client for South Africa.What should the company do to meet these requirements?Read More →

A company manages a microservices application on Amazon EC2 instances.A developer has integrated the AWS X-Ray SDK with the application.The developer also has an IAM role that is associated with the EC2 instances.The role includes the AWSXRayDaemonWriteAccess managed IAM policy.When the developer queries the X-Ray traces by using the GetServiceGraph API operation, no errors and no trace data are returned.What could be the reason that no X-Ray trace data is being returned? (Choose two.)Read More →

An application is real-time processing millions of events that are received through an API.What service could be used to allow multiple consumers to process the data concurrently and MOST cost-effectively?Read More →

A company has a web application that is deployed on AWS.The application uses an Amazon API Gateway API and an AWS Lambda function as its backend.The application recently demonstrated unexpected behavior.A developer examines the Lambda function code, finds an error, and modifies the code to resolve the problem.Before deploying the change to production, the developer needs to run tests to validate that the application operates properly.The application has only a production environment available.The developer must create a new development environment to test the code changes.The developer must also prevent other developers from overwriting these changes during the test cycle.Which combination of steps will meet these requirements with the LEAST development effort? (Choose two.)Read More →

A company has an ecommerce application.To track product reviews, the company’s development team uses an Amazon DynamoDB table.Every record includes the following:• A Review ID, a 16-digit universally unique identifier (UUID)• A Product ID and User ID, 16-digit UUIDs that reference other tables• A Product Rating on a scale of 1-5• An optional comment from the userThe table partition key is the Review ID.The most performed query against the table is to find the 10 reviews with the highest rating for a given product.Which index will provide the FASTEST response for this query?Read More →

A development team set up a pipeline to launch a test environment.The developers want to automate tests for their application.The team created an AWS CodePipeline stage to deploy the application to a test environment in batches using AWS Elastic Beanstalk.A later CodePipeline stage contains a single action that uses AWS CodeBuild to run numerous automated Selenium-based tests on the deployed application.The team must speed up the pipeline without removing any of the individual tests.Which set of actions will MOST effectively speed up application deployment and testing?Read More →

A developer is deploying a company’s application to Amazon EC2 instances.The application generates gigabytes of data files each day.The files are rarely accessed, but the files must be available to the application’s users within minutes of a request during the first year of storage.The company must retain the files for 7 years.How can the developer implement the application to meet these requirements MOST cost-effectively?Read More →