Developer Associate (Page 28)

A company has a two-tier application that consists of a frontend application and an Amazon RDS for MySQL database. The frontend application retrieves data from the database. The data consists of postal codes and their associated geographic coordinates The application performs many more database reads than writes. The application retrieves each postal code from the database thousands of times each day.A developer must improve the performance of the application to decrease latency.Which change should the developer make to the application to meet these requirements?Read More →

A company is migrating legacy internal applications to AWS.Leadership wants to rewrite the internal employee directory to use native AWS services.A developer needs to create a solution for storing employee contact details and high-resolution photos for use with the new application.Which solution will enable the search and retrieval of each employee’s individual details and high-resolution photos using AWS APIs?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 →

A developer is creating a machine learning (ML) pipeline in AWS Step Functions that contains AWS Lambda functions.The developer has configured an Amazon Simple Queue Service (Amazon SQS) queue to deliver ML model parameters to the ML pipeline to train ML models.The developer uploads the trained models are uploaded to an Amazon S3 bucket.The developer needs a solution that can locally test the ML pipeline without making service integration calls to Amazon SQS and Amazon S3.Which solution will meet these requirements?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 company is running Amazon EC2 instances in multiple AWS accounts.A developer needs to implement an application that collects all the lifecycle events of the EC2 instances.The application needs to store the lifecycle events in a single Amazon Simple Queue Service (Amazon SQS) queue in the company’s main AWS account for further processing.Which solution will meet these requirements?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 →

For a deployment using AWS Code Deploy, what is the run order of the hooks for in-place deployments?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 financial company must store original customer records for 10 years for legal reasons.A complete record contains personally identifiable information (PII).According to local regulations, PII is available to only certain people in the company and must not be shared with third parties.The company needs to make the records available to third-party organizations for statistical analysis without sharing the PII.A developer wants to store the original immutable record in Amazon S3.Depending on who accesses the S3 document, the document should be returned as is or with all the PII removed.The developer has written an AWS Lambda function to remove the PII from the document.The function is named removePii.What should the developer do so that the company can meet the PII requirements while maintaining only one copy of the document?Read More →