DVA-C01 (Page 13)

A company is managing a NoSQL database on-premises to host a critical component of an application, which is starting to have scaling issues.The company wants to migrate the application to Amazon DynamoDB with the following considerations:• Optimize frequent queries• Reduce read latencies• Plan for frequent queries on certain key attributes of the tableWhich solution would help achieve these objectives?Read More →

A company wants to migrate its web application to AWS and leverage auto scaling to handle peak workloads.The solutions architect determined that the best metric for an auto scaling event is the number of concurrent users.Based on this information, what should the developer use to auto scale based on concurrent users?Read More →

An application reads data from an Amazon DynamoDB table.Several times a day, for a period of 15 seconds, me application receives multiple ProvisionedThroughputExceeded errors.How should this exception be handled?Read More →

A company’s developer is building a static website to be deployed in Amazon S3 for a production environment.The website integrates with an Amazon Aurora PostgreSQL database by using an AWS Lambda function.The website that is deployed to production will use a Lambda alias that points to a specific version of the Lambda function.The company must rotate the database credentials every 2 weeks.Lambda functions that the company deployed previously must be able to use the most recent credentials.Which solution will meet these requirements?Read More →

A company hosts a web application that writes to an Amazon DynamoDB table.Application users frequently observe and report errors.The development team examines Amazon CloudWatch logs and frequently sees the following error:400 Bad Request ProvisionedThroughputExceededExceptionWhat is the cause of this error?Read More →

A developer is building an application integrating an Amazon API Gateway with an AWS Lambda function.When calling the API.the developer receives the following error:Wed Nov 08 01:13:00 UTC 2017 : Method completed with status: 502What should the developer do to resolve the error?Read More →

A company is using AWS CloudFormation templates to deploy AWS resources.The company needs to update one of its AWS CloudFormation stacks.What can the company do to find out how the changes will impact the resources that are running?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 →

A developer is creating a serverless web application and maintains different branches of code.The developer wants to avoid updating the Amazon API Gateway target endpoint each time a new code push is performed.What solution would allow the developer to perform a code push efficiently, without the need to update the API Gateway?Read More →

A developer has created a Java application that makes HTTP requests directly to AWS services.Application logging shows 5xx HTTP response codes that occur at irregular intervals.The errors are affecting users.How should the developer update the application to improve the application’s resiliency?Read More →