Exam 6: AWS Certified Developer Associate (DVA-C01)

A Developer is creating a mobile application that will not require users to log in. What is the MOST efficient method to grant users access to AWS resources?

A legacy service has an XML-based SOAP interface. The Developer wants to expose the functionality of the service to external clients with the Amazon API Gateway. Which technique will accomplish this?

A Developer registered an AWS Lambda function as a target for an Application Load Balancer (ALB) using a CLI command. However, the Lambda function is not being invoked when the client sends requests through the ALB. Why is the Lambda function not being invoked?

A developer is creating a script to automate the deployment process for a serverless application. The developer wants to use an existing AWS Serverless Application Model (AWS SAM) template for the application. What should the developer use for the project? (Choose two.)

An application is using a custom library to make HTTP calls directly to AWS service endpoints. The application is experiencing transient errors that are causing processes to stop when each error is first encountered. A request has been made to make the application more resilient by adding error retries and exponential backoff. How should a developer implement the changes with MINIMAL custom code?

A company is using AWS CodeBuild to compile a website from source code stored in AWS CodeCommit. A recent change to the source code has resulted in the CodeBuild project being unable to successfully compile the website. How should the Developer identify the cause of the failures?

For a deployment using AWS CodeDeploy, what is the run order of the hooks for in-place deployments?

An application has the following requirements: Performance efficiency of seconds with up to a minute of latency. The data storage size may grow up to thousands of terabytes. Per-message sizes may vary between 100 KB and 100 MB. Data can be stored as key/value stores supporting eventual consistency. What is the MOST cost-effective AWS service to meet these requirements?

A Developer is migrating an on-premises application to AWS. The application currently takes user uploads and saves them to a local directory on the server. All uploads must be saved and made immediately available to all instances in an Auto Scaling group. Which approach will meet these requirements?

A company has developed a new serverless application using AWS Lambda functions that will be deployed using the AWS Serverless Application Model (AWS SAM) CLI. Which step should the developer complete prior to deploying the application?

A Developer has been asked to create an AWS Lambda function that is triggered any time updates are made to items in an Amazon DynamoDB table. The function has been created, and appropriate permissions have been added to the Lambda execution role. Amazon DynamoDB streams have been enabled for the table, but the function is still not being triggered. Which option would enable DynamoDB table updates to trigger the Lambda function?

A company has a legacy application that was migrated to a fleet of Amazon EC2 instances. The application stores data in a MySQL database that is currently installed on a single EC2 instance. The company has decided to migrate the database from the EC2 instance to MySQL on Amazon EDS. What should the Developer do to update the application to support data storage in Amazon RDS?

A developer wants to secure sensitive configuration data such as passwords, database strings, and application license codes. Access to this sensitive information must be tracked for future audit purposes. Where should the sensitive information be stored, adhering to security best practices and operational requirements?

A company has implemented AWS CodePipeline to automate its release pipelines. The Development team is writing an AWS Lambda function what will send notifications for state changes of each of the actions in the stages. Which steps must be taken to associate the Lambda function with the event source?

A developer wants to ensure the Amazon EC2 instances in AWS Elastic Beanstalk execute a certain set of commands before the application is ready to use. Which Elastic Beanstalk feature will allow the developer to accomplish this?

A Developer is building a web application that uses Amazon API Gateway to expose an AWS Lambda function to process requests from clients. During testing, the Developer notices that the API Gateway times out even though the Lambda function finishes under the set time limit. Which of the following API Gateway metrics in Amazon CloudWatch can help the Developer troubleshoot the issue? (Choose two.)

Where should an Elastic Beanstalk configuration file named healthcheckur1.config be placed in the application source bundle?

A developer is building an application that will run on Amazon EC2 instances. The application needs to connect to an Amazon DynamoDB table to read and write records. The security team must periodically rotate access keys. Which approach will satisfy these requirements?

A Developer is making changes to a custom application that is currently using AWS Elastic Beanstalk. After the Developer completes the changes, what solutions will update the Elastic Beanstalk environment with the new application version? (Choose two.)

A developer has written an AWS Lambda function using Java as the runtime environment. The developer wants to isolate a performance bottleneck in the code. Which steps should be taken to reveal the bottleneck?