Developer Associate (Page 45)

A company that has multiple offices uses an Amazon DynamoDB table to store employee payroll information. Item attributes consist of employee names, office identifiers, and cumulative daily hours worked The most frequently used query extracts a report of an alphabetical subset of employees for a specific office.Which design of the DynamoDB table primary key will have the MINIMUM performance impact?Read More →

A company built an online event platform.For each event, the company organizes quizzes and generates leaderboards that are based on the quiz scores.The company stores the leaderboard data in Amazon DynamoDB and retains the data for 30 days after an event is complete.The company then uses a scheduled job to delete the old leaderboard data.The DynamoDB table is configured with a fixed write capacity.During the months when many events occur, the DynamoDB write API requests are throttled when the scheduled delete job runs.A developer must create a long-term solution that deletes the old leaderboard data and optimizes write throughput.Which solution meets these requirements?Read More →

A company hosts a microservices application that uses Amazon API Gateway.AWS Lambda, Amazon Simple Queue Service (Amazon SQS), and AmazonDynamoDB.One of the Lambda functions adds messages to an SQS FIFO queue.When a developer checks the application logs, the developer finds a few duplicated items in a DynamoDB table.The items were inserted by another polling function that processes messages from the queue.What is the MOST likely cause of this issue?Read More →

A developer has an application that stores data in an Amazon S3 bucket.The application uses an HTTP API to store and retrieve objects.When the PutObject API operation adds objects to the S3 bucket the developer must encrypt these objects at rest by using server-side encryption with Amazon S3 managed keys (SSE-S3).Which solution will meet this requirement?Read More →

A development team has been using a builder server that is hosted on an Amazon EC2 instance to perform builds and deployments for the last 3 months.TheEC2 instance’s instance profile uses an IAM role that contains the Administrator Access managed policy.The development team must replace that policy with a policy that provides only the required permissions.What is the FASTEST way to create a custom 1AM policy for the EC2 instance to meet this requirement?Read More →

A developer is creating a mobile app that calls a backend service by using an Amazon API Gateway REST API.For integration testing during the development phase, the developer wants to simulate different backend responses without invoking the backend service.Which solution will meet these requirements with the LEAST operational overhead?Read More →

A developer is working on a web application that runs on Amazon Elastic Container Service (Amazon ECS) and uses an Amazon DynamoDB table to store data.The application performs a large number of read requests against a small set of the table data.How can the developer improve the performance of these requests? (Choose two.)Read More →

An application uses Lambda functions to extract metadata from files uploaded to an S3 bucket; the metadata is stored in Amazon DynamoDB.The application starts behaving unexpectedly, and the developer wants to examine the logs of the Lambda function code for errors.Based on this system configuration, where would the developer find the logs?Read More →

A developer is designing an Amazon DynamoDB table for an application.The application will store user information that includes a unique identifier and an email address for each user.The application must be able to query the table by using either the unique identifier or the email address.How should the developer design the DynamoDB table to meet these requirements?Read More →

A developer is using AWS Amplify Hosting to build and deploy an application.The developer is receiving an increased number of bug reports from users.The developer wants to add end-to-end testing to the application to eliminate as many bugs as possible before the bugs reach production.Which solution should the developer implement to meet these requirements?Read More →