DVA-C01 (Page 15)

A company hosts a client-side web application for one of its subsidiaries on Amazon S3.The web application can be accessed through Amazon CloudFront from https://www.example.com.After a successful rollout, the company wants to host three more client-side web applications for its remaining subsidiaries on three separate S3 buckets.To achieve this goal, a developer moves all the common JavaScript files and web fonts to a central S3 bucket that serves the web applications.However, during testing, the developer notices that the browser blocks the JavaScript files and web fonts.What should the developer do to prevent the browser from blocking the JavaScript files and web fonts?Read More →

A business intelligence application runs on Amazon Elastic Container Service (Amazon ECS) on AWS Fargate.Application-level audits require a searchable log of all API calls from users to the application.The application’s developers must store the logs centrally on AWS.Which solution will meet these requirements?Read More →

A developer is creating an AWS Lambda function to process streaming data from an Amazon Kinesis data stream.When the Lambda function parses the data and encounters a malformed record from the stream, the Lambda function exits with an error.The developer is observing duplicate records downstream from the function.When the developer uses a different client to examine the Kinesis data stream output, no duplicate records are visible in the stream.What is the reason for the duplicate records?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 (ldP) 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 government agency deploys a REST application on AWS.The agency integrates the application with AWS Lambda.The agency accesses the application through Amazon API Gateway.The agency has the following policies:• Number versions to manage the deployment of all Lambda functions to production• Create a PROD alias to point to each function• Reference the PROD aliases in the production stages of API GatewayOne Lambda function contains the environment variables that are used to externalize connection parameters.The PROD alias points to version 10 of the Lambda function.A developer needs to update the connection parameters and ensure that the updated Lambda function is available on production.Which solution will meet these requirements?Read More →

A Developer has been asked to make changes to the source code of an AWS Lambda function.The function is managed using an AWS CloudFormation template.The template is configured to load the source code from an Amazon S3 bucket.The Developer manually created a .ZIP file deployment package containing the changes and put the file into the correct location on Amazon S3.When the function is invoked, the code changes have not been applied.What step is required to update the function with the changes?Read More →

A developer is creating a Java application that will store sensitive data in an Amazon DynamoDB table.The data must be encrypted at all times.How can the developer meet this requirement?Read More →

A social media application stores millions of video clips in Amazon S3 and serves them to users across the world.The traffic to the application varies, but access often increases suddenly to more than 10,000 PUT requests and GET requests each second.As the application has grown in popularity, users report poor quality of video streaming.Which solution will provide the LARGEST improvement in performance?Read More →

A developer is building a three-tier web application that should be able to handle a minimum of 5000 requests per minute.Requirements state that the web tier should be completely stateless while the application maintains session state for the users.How can session data be externalized, keeping latency at the LOWEST possible value?Read More →

A company has an AWS Lambda function that reads messages from an Amazon Simple Queue Service (Amazon SQS) queue by using the Amazon SQS API.The Lambda function is not processing all the messages successfully because of random failures of a third-party dependency.A developer needs to improve the reliability of the Lambda function so that the Lambda function will process each message successfully despite the failures of the third-party dependency.Which solution will meet this requirement with the LEAST effort?Read More →