DVA-C01 (Page 22)

A developer is developing an application that uses signed requests (Signature Version 4) to call other AWS services.The developer has created a canonical request, has created the string to sign, and has calculated signing information.Which methods could the developer use to complete a signed request? (Choose two.)Read More →

A developer maintains an Amazon API Gateway REST API.Customers use the API through a frontend UI and Amazon Cognito authentication.The developer has a new version of the API that contains new endpoints and backward-incompatible interface changes.The developer needs to provide beta access to other developers on the team without affecting customers.Which solution will meet these requirements with the LEAST operational overhead?Read More →

A developer is designing a serverless application for an ecommerce website.An Amazon API Gateway API exposes AWS Lambda functions for billing, payment, and user operations.The website features shopping carts for the users.The shopping carts must be stored for extended periods of time and will be retrieved frequently by the front-end application.The load on the application will vary significantly based on the time of day and the promotional sales that are offered on the website.The application must be able to scale automatically to meet these changing demands.Which solution will meet these requirements?Read More →

An application running on Amazon EC2 opens connections to an Amazon RDS SQL Server database.The developer does not want to store the user name and password for the database in the code.The developer would also like to automatically rotate the credentials.What is the MOST secure way to store and access the database credentials?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 developer is using an Amazon Kinesis Data Firehose delivery stream to store data in Amazon S3.Before storing the data in Amazon S3, the developer wants to enrich the data by combining the data with data from an Amazon DynamoDB table.How can the developer implement the data enrichment?Read More →

A developer is writing a serverless application that requires an AWS Lambda function to be invoked every 10 minutes.What is an automated and serverless way to invoke the function?Read More →

A developer has created a Java application that makes HTTP requests directly to AWS services.Application logging shows 5xx HTTP response codes that occur at irregular intervals.The errors are affecting users.How should the developer update the application to improve the application’s resiliency?Read More →

A developer is creating a serverless web application and maintains different branches of code.The developer wants to avoid updating the Amazon API Gateway target endpoint each time a new code push is performed.What solution would allow the developer to perform a code push efficiently, without the need to update the API Gateway?Read More →

A developer is deploying an application in the AWS Cloud by using AWS CloudFormation.The application will connect to an existing Amazon RDS database.The hostname of the RDS database is stored in AWS Systems Manager Parameter Store as a plaintext value.The developer needs to incorporate the database hostname into the CloudFormation template to initialize the application when the stack is created.How should the developer reference the parameter that contains the database hostname?Read More →