DVA-C02 (Page 18)

A developer is building a serverless application by using AWS Serverless Application Model (AWS SAM) on multiple AWS Lambda functions.When the application is deployed, the developer wants to shift 10% of the traffic to the new deployment of the application for the first 10 minutes after deployment.If there are no issues, all traffic must switch over to the new version.Which change to the AWS SAM template will meet these requirements?Read More →

A company has a serverless application on AWS that uses a fleet of AWS Lambda functions that have aliases.The company regularly publishes new Lambda function by using an in-house deployment solution.The company wants to improve the release process and to use traffic shifting.A newly published function version should initially make available only to a fixed percentage of production users.Which solution will meet these requirements?Read More →

A company has an application that stores data in Amazon RDS instances.The application periodically experiences surges of high traffic that cause performance problems.During periods of peak traffic, a developer notices a reduction in query speed in all database queries.The team’s technical lead determines that a multi-threaded and scalable caching solution should be used to offload the heavy read traffic.The solution needs to improve performance.Which solution will meet these requirements with the LEAST complexity?Read More →

A developer is setting up infrastructure by using AWS CloudFormation.If an error occurs when the resources described in the Cloud Formation template are provisioned, successfully provisioned resources must be preserved.The developer must provision and update the CloudFormation stack by using the AWS CLI.Which solution will meet these requirements?Read More →

A developer is creating an AWS CloudFormation stack.The stack contains IAM resources with custom names.When the developer tries to deploy the stack, they receive an InsufficientCapabilities error.What should the developer do to resolve this issue?Read More →

A developer needs to launch a new Amazon EC2 instance by using the AWS CLI.Which AWS CLI command should the developer use to meet this requirement?Read More →

An application uses AWS X-Ray to generate a large amount of trace data on an hourly basis.A developer wants to use filter expressions to limit the returned results through user-specified custom attributes.How should the developer use filter expressions to filter the results in X-Ray?Read More →

A developer built an application that calls an external API to obtain data, processes the data, and saves the result to Amazon S3.The developer built a container image with all of the necessary dependencies to run the application as a container.The application runs locally and requires minimal CPU and RAM resources.The developer has created an Amazon ECS cluster.The developer needs to run the application hourly in Amazon Elastic Container Service (Amazon ECS).Which solution will meet these requirements with the LEAST amount of infrastructure management overhead?Read More →

A company uses Amazon Simple Queue Service (Amazon SQS) to decouple its microservices architecture.Some messages in an SQS queue contain sensitive information.A developer must implement a solution that encrypts all the data at rest.Which solution will meet this requirement?Read More →

A developer is deploying an application in the AWS Cloud by using AWS CloudFormation.The application will connect to an existing Amazon RDS database.The hostname of the RDS database is stored in AWS Systems Manager Parameter Store as a plaintext value.The developer needs to incorporate the database hostname into the CloudFormation template to initialize the application when the stack is created.How should the developer reference the parameter that contains the database hostname?Read More →