DVA-C01 (Page 8)

A company has point-of-sale devices across thousands of retail shops that synchronize sales transactions with a centralized system.The system includes anAmazon API Gateway API that exposes an AWS Lambda function.The Lambda function processes the transactions and stores the transactions in Amazon RDS for MySQL.The number of transactions increases rapidly during the day and is near zero at night.How can a developer increase the elasticity of the system MOST cost-effectively?Read More →

A company is using AWS CodeDeploy for all production deployments.A developer has an Amazon Elastic Container Service (Amazon ECS) application that uses the CodeDeployDefault.ECSAIIAtOnce configuration.The developer needs to update the production environment in increments of 10% until the entire production environment is updated.Which CodeDeploy configuration should the developer use to meet these requirements?Read More →

A developer creates a customer managed key for multiple AWS users to encrypt data in Amazon S3.The developer configures Amazon Simple NotificationService (Amazon SNS) to publish a message if key deletion is scheduled.The developer needs to preserve any SNS messages that cannot be delivered so that those messages can be reprocessed.Which AWS service or feature should the developer use to meet this requirement?Read More →

An application under development is required to store hundreds of video files.The data must be encrypted within the application prior to storage, with a unique key for each video file.How should the Developer code the application?Read More →

A developer has created an AWS Lambda function that is written in Python.The Lambda function reads data from objects in Amazon S3 and writes data to an Amazon DynamoDB table.The function is successfully invoked from an S3 event notification when an object is created.However, the function fails when it attempts to write to the DynamoDB table.What is the MOST likely cause of this issue?Read More →

A company has a two-tier application running on an Amazon EC2 server that handles all of its AWS based e-commerce activity.During peak times, the backend servers that process orders are overloaded with requests.This results in some orders failing to process.A developer needs to create a solution that will re-factor the application.Which steps will allow for more flexibility during peak times, while still remaining cost-effective? (Choose two.)Read More →

An application running on multiple Amazon EC2 instances pulls messages from a standard Amazon SQS queue.A requirement for the application is that all messages must be encrypted at rest.Developers are instructed to use methods that allow for centralized key management and minimize possible support requirements whenever possible.Which of the following solutions supports these requirements?Read More →

A company has a multi-node Windows legacy application that runs on premises.The application uses a network shared folder as a centralized configuration repository to store configuration files in .xml format.The company is migrating the application to Amazon EC2 instances.As part of the migration to AWS, a developer must identify a solution that provides high availability for the repository.Which solution will meet this requirement MOST cost-effectively?Read More →

A company created an application to consume and process data.The application uses Amazon Simple Queue Service (Amazon SQS) and AWS Lambda functions.The application is currently working as expected, but it occasionally receives several messages that it cannot process properly.The company needs to clear these messages to prevent the queue from becoming blocked.A developer must implement a solution that makes queue processing always operational.The solution must give the company the ability to defer the messages with errors and save these messages for further analysis.What is the MOST operationally efficient solution that meets these requirements?Read More →

A developer has discovered that an application responsible for processing messages in an Amazon SQS queue is routinely falling behind.The application is capable of processing multiple messages in one invocation, but is only receiving one message at a time.What should the developer do to increase the number of messages the application receives?Read More →