DVA-C02 (Page 16)

A developer is creating an application that will give users the ability to store photos from their cellphones in the cloud.The application needs to support tens of thousands of users.The application uses an Amazon API Gateway REST API that is integrated with AWS Lambda functions to process the photos.The application stores details about the photos in Amazon DynamoDB.Users need to create an account to access the application.In the application, users must be able to upload photos and retrieve previously uploaded photos.The photos will range in size from 300 KB to 5 MB.Which solution will meet these requirements with the LEAST operational overhead?Read More →

A developer maintains applications that store several secrets in AWS Secrets Manager.The applications use secrets that have changed over time.The developer needs to identify required secrets that are still in use.The developer does not want to cause any application downtime.What should the developer do to meet these requirements?Read More →

A company has an application that uses AWS CodePipeline to automate its continuous integration and continuous delivery (CI/CD) workflow.The application uses AWS CodeCommit for version control.A developer who was working on one of the tasks did not pull the most recent changes from the main branch.A week later, the developer noticed merge conflicts.How can the developer resolve the merge conflicts in the developer’s branch with the LEAST development effort?Read More →

A company is building a serverless application on AWS.The application uses an AWS Lambda function to process customer orders 24 hours a day, 7 days a week.The Lambda function calls an external vendor’s HTTP API to process payments.During load tests, a developer discovers that the external vendor payment processing API occasionally times out and returns errors.The company expects that some payment processing API calls will return errors.The company wants the support team to receive notifications in near real time only when the payment processing external API error rate exceed 5% of the total number of transactions in an hour.Developers need to use an existing Amazon Simple Notification Service (Amazon SNS) topic that is configured to notify the support team.Which solution will meet these requirements?Read More →

A developer has written an AWS Lambda function.The function is CPU-bound.The developer wants to ensure that the function returns responses quickly.How can the developer improve the function’s performance?Read More →

A company has an application that uses Amazon Cognito user pools as an identity provider.The company must secure access to user records.The company has set up multi-factor authentication (MFA).The company also wants to send a login activity notification by email every time a user logs in.What is the MOST operationally efficient solution that meets this requirement?Read More →

A company has a multi-node Windows legacy application that runs on premises.The application uses a network shared folder as a centralized configuration repository to store configuration files in .xml format.The company is migrating the application to Amazon EC2 instances.As part of the migration to AWS, a developer must identify a solution that provides high availability for the repository.Which solution will meet this requirement MOST cost-effectively?Read More →

A developer is working on an ecommerce platform that communicates with several third-party payment processing APIs.The third-party payment services do not provide a test environment.The developer needs to validate the ecommerce platform’s integration with the third-party payment processing APIs.The developer must test the API integration code without invoking the third-party payment processing APIs.Which solution will meet these requirements?Read More →

A developer is creating a database of products.Queries for frequently accessed products must have retrieval times of microseconds.To ensure data consistency, the application cache must be updated whenever products are added, changed, or deleted.Which solution will meet these requirements?Read More →

A company has deployed infrastructure on AWS.A development team wants to create an AWS Lambda function that will retrieve data from an Amazon Aurora database.The Amazon Aurora database is in a private subnet in company’s VPC.The VPC is named VPC1.The data is relational in nature.The Lambda function needs to access the data securely.Which solution will meet these requirements?Read More →