DVA-C01 (Page 31)

A company is hosting an Amazon API Gateway REST API that calls a single AWS Lambda function.The function is infrequently invoked by multiple clients at the same time.The code performance is optimal, but the company wants to optimize the startup time of the function.What can a developer do to optimize the initialization of the function?Read More →

A developer is trying to determine which IAM user is calling several AWS APIs from an application.Which service would provide this information?Read More →

A company is using AWS CloudFormation to deploy a two-tier application.The application will use Amazon RDS as its backend database.The company wants a solution that will randomly generate the database password during deployment.The solution also must automatically rotate the database password without requiring changes to the application.What is the MOST operationally efficient solution that meets these requirements?Read More →

A company designs a mobile app to run on AWS.The app will run on Amazon EC2 instances behind an Application Load Balancer.The instances will run in an Amazon EC2 Auto Scaling group.The app must securely access data that the company stores in Amazon DynamoDB.Which solution is MOST secure?Read More →

A developer is working on a serverless application that needs to process any changes to an Amazon DynamoDB table with an AWS Lambda function.How should the developer configure the Lambda function to detect changes to the DynamoDB table?Read More →

A development team uses AWS CodeDeploy to deploy software changes to Amazon EC2 instances.The deployments begin to fail.The team traces the problem to a specific EC2 instance.The CodeDeploy agent’s log file contains the following error message:InvalidSignatureException Signature expired: |time| is now earlier than |time|What is the underlying cause of this issue?Read More →

An AWS Elastic Beanstalk application needs to be deployed in multiple regions and requires a different Amazon Machine Image (AMI) in each region.Which AWS CloudFormation template key can be used to specify the correct AMI for each region?Read More →

A developer designed an application on an Amazon EC2 instance.The application makes API requests to objects in an Amazon S3 bucket.Which combination of steps will ensure that the application makes the API requests in the MOST secure manner? (Choose two.)Read More →

A Developer has been asked to create an AWS Lambda function that is triggered any time updates are made to items in an Amazon DynamoDB table.The function has been created, and appropriate permissions have been added to the Lambda execution role.Amazon DynamoDB streams have been enabled for the table, but the function is still not being triggered.Which option would enable DynamoDB table updates to trigger the Lambda function?Read More →

A developer tested an application locally and then deployed it to AWS Lambda.While testing the application remotely, the Lambda function fails with an access denied message.How can this issue be addressed?Read More →