DVA-C02 (Page 36)

A company deploys a new application to AWS.The company is streaming application logs to Amazon CloudWatch Logs.The company’s development team must receive notification by email when the word “ERROR” appears in any log lines.A developer sets up an Amazon Simple Notification Service (Amazon SNS) topic and subscribes the development team to the topic.What should the developer do next to meet the requirements?Read More →

A company runs a payment application on Amazon EC2 instances behind an Application Load Balance.The EC2 instances run in an Auto Scaling group across multiple Availability Zones.The application needs to retrieve application secrets during the application startup and export the secrets as environment variables.These secrets must be encrypted at rest and need to be rotated every month.Which solution will meet these requirements with the LEAST development effort?Read More →

A company runs an application on AWS.The application stores data in an Amazon DynamoDB table.Some queries are taking a long time to run.These slow queries involve an attribute that is not the table’s partition key or sort key.The amount of data that the application stores in the DynamoDB table is expected to increase significantly.A developer must increase the performance of the queries.Which solution will meet these requirements?Read More →

A company is adopting serverless computing for some of its new services.A development team needs to create a serverless infrastructure by using AWS Serverless Application Model (AWS SAM).All infrastructure must be deployed by using AWS CloudFormation templates.What should the development team do to meet these requirements?Read More →

A developer uses AWS CloudFormation to deploy an Amazon API Gateway API and an AWS Step Functions state machine.The state machine must reference the API Gateway API after the CloudFormation template is deployed.The developer needs a solution that uses the state machine to reference the API Gateway endpoint.Which solution will meet these requirements MOST cost-effectively?Read More →

A company runs a serverless application on AWS.The application includes an AWS Lambda function.The Lambda function processes data and stores the data in an Amazon RDS for PostgreSQL database.A developer created a user credentials in the database for the application.The developer needs to use AWS Secrets Manager to manage the user credentials.The password must to be rotated on a regular basis.The solution needs to ensure that there is high availability and no downtime for the application during secret rotation.What should the developer do to meet these requirements?Read More →

A developer is building a serverless application on AWS for a workflow that processes high volumes of data.In the workflow, an AWS Step Functions state machine invokes several AWS Lambda functions.One of the Lambda functions occasionally fails because of timeout errors during periods of high demand.The developer must ensure that the workflow automatically retries the failed function invocation if a timeout error occurs.Which solution will meet this requirement?Read More →

A company’s developer has deployed an application in AWS by using AWS CloudFormation.The CloudFormation stack includes parameters in AWS Systems Manager Parameter Store that the application uses as configuration settings.The application can modify the parameter values.When the developer updated the stack to create additional resources with tags, the developer noted that the parameter values were reset and that the values ignored the latest changes made by the application.The developer needs to change the way the company deploys the CloudFormation stack.The developer also needs to avoid resetting the parameter values outside the stack.Which solution will meet these requirements with the LEAST development effort?Read More →

A developer is creating a serverless application that uses an AWS Lambda function.The developer will use AWS CloudFormation to deploy the application.The application will write logs to Amazon CloudWatch Logs.The developer has created a log group in a CloudFormation template for the application to use.The developer needs to modify the CloudFormation template to make the name of the log group available to the application at runtime.Which solution will meet this requirement?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 →