DVA-C02 (Page 36)

A developer is integrating Amazon ElastiCache in an application.The cache will store data from a database.The cached data must populate real-time dashboards.Which caching strategy will meet these requirements?Read More →

A company uses an AWS Lambda function to transfer files from an Amazon S3 bucket to the company’s SFTP server.The Lambda function connects to the SFTP server by using credentials such as username and password.The company uses Lambda environment variables to store these credentials.A developer needs to implement encrypted username and password credentials.Which solution will meet these requirements?Read More →

A developer manages a website that distributes its content by using Amazon CloudFront.The website’s static artifacts are stored in an Amazon S3 bucket.The developer deploys some changes and can see the new artifacts in the S3 bucket.However, the changes do not appear on the webpage that the CloudFront distribution delivers.How should the developer resolve this issue?Read More →

A developer received the following error message during an AWS CloudFormation deployment:DELETE_FAILED (The following resource(s) failed to delete: [ASGInstanceRole12345678].)Which action should the developer take to resolve this error?Read More →

A company is running a custom application on a set of on-premises Linux servers that are accessed using Amazon API Gateway.AWS X-Ray tracing has been enabled on the API test stage.How can a developer enable X-Ray tracing on the on-premises servers with the LEAST amount of configuration?Read More →

An AWS Lambda function is invoked asynchronously to process events.Occasionally, the Lambda function falls to process events.A developer needs to collect and analyze these failed events to fix the issue.What should the developer do to meet these requirements with the LEAST development effort?Read More →

A developer is migrating some features from a legacy monolithic application to use AWS Lambda functions instead.The application currently stores data in an Amazon Aurora DB cluster that runs in private subnets in a VPC.The AWS account has one VPC deployed.The Lambda functions and the DB cluster are deployed in the same AWS Region in the same AWS account.The developer needs to ensure that the Lambda functions can securely access the DB cluster without crossing the public internet.Which solution will meet these requirements?Read More →

A developer has a legacy application that is hosted on-premises.Other applications hosted on AWS depend on the on-premises application for proper functioning.In case of any application errors, the developer wants to be able to use Amazon CloudWatch to monitor and troubleshoot all applications from one place.How can the developer accomplish this?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 developer is building a microservice that uses AWS Lambda to process messages from an Amazon Simple Queue Service (Amazon SQS) standard queue.The Lambda function calls external APIs to enrich the SQS message data before loading the data into an Amazon Redshift data warehouse.The SQS queue must handle a maximum of 1,000 messages per second.During initial testing, the Lambda function repeatedly inserted duplicate data into the Amazon Redshift table.The duplicate data led to a problem with data analysis.All duplicate messages were submitted to the queue within 1 minute of each other.How should the developer resolve this issue?Read More →