Developer Associate (Page 25)

A company has an application that runs across multiple AWS Regions.The application is experiencing performance issues at irregular intervals.A developer must use AWS X-Ray to implement distributed tracing for the application to troubleshoot the root cause of the performance issues.What should the developer do to meet this requirement?Read More →

A developer is implementing an AWS Lambda function that will be invoked when an object is uploaded to Amazon S3.The developer wants to test the Lambda function in a local development machine before publishing the function to a production AWS account.Which solution will meet these requirements with the LEAST operational overhead?Read More →

A developer is using AWS Step Functions to automate a workflow.The workflow defines each step as an AWS Lambda function task.The developer notices that runs of the Step Functions state machine fail in the GetResource task with either an IllegalArgumentException error or a TooManyRequestsException error.The developer wants the state machine to stop running when the state machine encounters an IllegalArgumentException error.The state machine needs to retry the GetResource task one additional time after 10 seconds if the state machine encounters a TooManyRequestsException error.If the second attempt fails, the developer wants the state machine to stop running.How can the developer implement the Lambda retry functionality without adding unnecessary complexity to the state machine?Read More →

A company deployed an application as a set of microservices that run on Amazon Elastic Container Service (Amazon ECS) behind an Application Load Balancer (ALB).The performance of the microservices has started to degrade for a specific set of user requests.The company needs to gain deeper insight into the request behavior that is associated with the performance degradation.Which process will meet this requirement?Read More →

An AWS Lambda function requires read access to an Amazon S3 bucket and requires read/write access to an Amazon DynamoDB table.The correct IAM policy already exists.What is the MOST secure way to grant the Lambda function access to the S3 bucket and the DynamoDB table?Read More →

A developer is building an application on Amazon EC2.The developer encountered an “Access Denied” error on some of the API calls to AWS services while testing.The developer needs to modify permissions that have been already given to the instance.How can these requirements be met with minimal changes and minimum downtime?Read More →

A developer has an application that makes batch requests directly to Amazon DynamoDB by using the BatchGetItem low-level API operation.The responses frequently return values in the UnprocessedKeys element.Which actions should the developer take to increase the resiliency of the application when the batch response includes values in UnprocessedKeys? (Choose two.)Read More →

A developer wants to use AWS CodeDeploy to deploy an AWS Lambda function.What are the MINIMUM properties required in the ‘resources’ section of the AppSpec file for CodeDeploy to deploy the function successfully?Read More →

A developer is using an AWS Lambda function to generate avatars for profile pictures that are uploaded to an Amazon S3 bucket.The Lambda function is automatically invoked for profile pictures that are saved under the /original/ S3 prefix.The developer notices that some pictures cause the Lambda function to time out.The developer wants to implement a fallback mechanism by using another Lambda function that resizes the profile picture.Which solution will meet these requirements with the LEAST development effort?Read More →

A developer is working on a serverless project.Initial testing shows that a cold start takes about 8 seconds on average for AWS Lambda functions.Which actions should the developer take to reduce the cold start time? (Choose two.)Read More →