aws developer associate practice exam Intermediate Practice Exam: Medium Difficulty 2025

A development team is building a serverless application using AWS Lambda functions that process orders from an SQS queue. During peak hours, some messages are being processed multiple times, causing duplicate order entries in the database. The Lambda function timeout is set to 5 minutes, and the SQS visibility timeout is set to 30 seconds. What should the developer do to resolve this issue?

A developer is implementing authentication for a mobile application that needs to access AWS resources. Users will sign in using their social media accounts (Google, Facebook). The application requires temporary AWS credentials with appropriate permissions based on the user's identity. Which combination of AWS services should the developer use?

A developer has containerized an application and wants to deploy it to AWS using a blue/green deployment strategy. The application consists of multiple Docker containers that need to work together and requires a load balancer. The deployment process should automatically shift traffic from the old version to the new version with minimal manual intervention. Which AWS service and deployment configuration should be used?

A Lambda function is experiencing performance issues when connecting to an RDS database. The function execution time increases significantly during cold starts, and the developer notices that database connection establishment takes 2-3 seconds. The function is invoked frequently throughout the day. What is the MOST effective solution to improve performance?

A developer needs to implement fine-grained access control for a DynamoDB table where users can only read and write their own items. Each item has a partition key named 'userId'. The application uses Amazon Cognito for authentication. How should the developer configure the IAM policy for the authenticated role?

A company's API built with Amazon API Gateway and Lambda is receiving requests with varying load throughout the day. During sudden traffic spikes, some requests are returning 429 (Too Many Requests) errors. The Lambda function has sufficient concurrency available. What is the MOST likely cause and solution?

A developer is using AWS CodePipeline to automate deployments. The pipeline has three stages: Source (CodeCommit), Build (CodeBuild), and Deploy (CodeDeploy to EC2). The company wants to add a manual approval step before deploying to production, and also send notifications to a development team via email when approval is needed. How should this be implemented?

A developer is building a REST API using API Gateway and Lambda. The Lambda function needs to access sensitive database credentials. The credentials must be rotated automatically every 30 days without requiring code changes or redeployment. Which approach should the developer implement?

A developer has deployed a Node.js application to AWS Elastic Beanstalk. After deployment, the application health status shows 'Severe' and the EC2 instances are being terminated and replaced repeatedly. The application logs show that the application starts successfully but the health check fails. The application listens on port 3000, but the default Elastic Beanstalk configuration expects port 80. What should the developer do to fix this issue?

A developer is using AWS X-Ray to trace requests through a distributed application consisting of API Gateway, Lambda, and DynamoDB. The traces show that 15% of requests have high latency, but the developer cannot determine which specific DynamoDB operations are slow. The Lambda function makes multiple DynamoDB calls per request. What should the developer do to get more detailed trace information?