DVA-C01 (Page 5)

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 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 →

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 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 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 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 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 company deploys a photo-processing application to an Amazon EC2 instance The application needs to process each photo in less than 5 seconds. If processing takes longer than 5 seconds, the company’s development team must receive a notification.How can a developer implement the required time measurement and notification with the LEAST operational overhead?Read More →

A company has an AWS Lambda function that runs hourly, reads log files that are stored in Amazon S3, and forwards alerts to Amazon Simple Notification Service (Amazon SNS) topics based on content.A developer wants to add a custom metric to the Lambda function to track the number of alerts of each type for each run.The developer needs to log this information in Amazon CloudWatch in a metric that is named Lambda/AlertCounts.How should the developer modify the Lambda function to meet this requirement with the LEAST operational overhead?Read More →

A company is running a software-as-a-service (SaaS) application in its on-premises data center.The application architecture uses a frontend Apache web server to support many customer-specific websites.The Apache web server routes traffic to a different set of servers based on the domain name that is specified in the host header of the initial request.The company decides to move its architecture to AWS.A developer is moving the customer-specific backend servers onto Amazon EC2 instances.The developer must configure the EC2 instances in Auto Scaling groups for each customer and must register the instances in different target groups.The developer needs to replace the frontend Apache web server with an Elastic Load Balancing (ELB) load balancer.The developer also must forward queries for specific domain names to the appropriate target groups.Which configuration on AWS will meet these requirements?Read More →