DVA-C01 (Page 24)

A development team is designing a mobile app that requires multi-factor authentication.Which steps should be taken to achieve this? (Choose two.)Read More →

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 has a web application in an Amazon Elastic Container Service (Amazon ECS) cluster running hundreds of secure services in AWS Fargate containers.The services are in target groups routed by an Application Load Balancer (ALB).Application users log in to the website anonymously, but they must be authenticated using any OpenID Connect protocol-compatible identity provider (IdP) to access the secure services.Which authentication approach would meet these requirements with the LEAST amount of effort?Read More →

A developer has created an AWS Lambda function to provide notification through Amazon Simple Notification Service (Amazon SNS) whenever a file is uploaded to Amazon S3 that is larger than 50 MB.The developer has deployed and tested the Lambda function by using the CLI.However, when the event notification is added to the S3 bucket and a 3,000 MB file is uploaded, the Lambda function does not launch.Which of the following is a possible reason for the Lambda function’s inability to launch?Read More →

A distributed application includes an AWS Lambda function that runs successfully in the DEV environment with 128 MB of memory assigned.The same function is failing in the TEST environment.The developer is monitoring the application using AWS X-Ray, but the Lambda function cannot be seen on the X-Ray service graph.The Lambda execution role has AWS X-Ray permissions.What is the MOST LIKELY cause for AWS X-Ray not showing any data for the Lambda function?Read More →

A company is running an application on AWS Elastic Beanstalk in a single-instance environment.The company’s deployments must avoid any downtime.Which deployment option will meet these requirements?Read More →

A developer needs to create an application that supports Security Assertion Markup Language (SAML) and authentication with social media providers.It must also allow access to AWS services, such as Amazon DynamoDB.Which AWS service or feature will meet these requirements with the LEAST amount of additional coding?Read More →

A company has moved a legacy on-premises application to AWS by performing a lift and shift.The application exposes a REST API that can be used to retrieve billing information.The application is running on a single Amazon EC2 instance.The application code cannot support concurrent invocations.Many clients access the API, and the company adds new clients all the time.A developer is concerned that the application might become overwhelmed by too many requests.The developer needs to limit the number of requests to the API for all current and future clients.The developer must not change the API, the application, or the client code.What should the developer do to meet these requirements?Read More →

A developer is exposing an API by using Amazon API Gateway and AWS Lambda as the backend for an application.The developer wants to add validation rules for a POST method to ensure that the data from the frontend web form is valid.The validation rules must include mandatory fields, data type, length, and regular expressions.Which solution will meet these requirements?Read More →

A static website is hosted in an Amazon S3 bucket.Several HTML pages on the site use JavaScript to download images from another Amazon S3 bucket.These images are not displayed when users browse the site.What is the possible cause for the issue?Read More →