AWS Certified Developer Associate

AWS Certified Developer Associate practice questions, page 17 of 18, with answer review and explanations.

Question 81

A company is planning to use AWS CodeDeploy to deploy an application to AWS Lambda. During the deployment of a new version of the application, the company initially must expose only 10% of live traffic to the new version of the deployed application. Then, every 10 minutes, the company must route another 10% of live traffic to the new version of the deployed application until all live traffic is routed to the new version. Which CodeDeploy predefined configuration will meet these requirements?

  1. CodeDeployDefault.OnceAtATime
  2. CodeDeployDefault.LambdaCanary10Percent10Minutes
  3. CodeDeployDefault.LambdaLinear10PercentEvery10Minutes
  4. CodeDeployDefault.ECSLinear10PercentEvery3Minutes

Question 82

A developer wants to use AWS Elastic Beanstalk to test a new version of on application in a test environment. Which deployment method offers the FASTEST deployment?

  1. Immutable
  2. Rolling
  3. Rolling with additional batch
  4. All at once

Question 83

A developer has built an application that inserts data into an Amazon DynamoDB table. The table is configured to use provisioned capacity. The application is deployed on a burstable nano Amazon EC2 Instance. The application logs show that the application has been failing because of a ProvisionedThroughputExceedException error. Which actions should the developer take to resolve this issue? (Choose two.)

  1. Move The application to a larger EC instance.
  2. Increase the number or read capacity units (RCUs) that are provisioned for the DynamoDB table.
  3. Reduce the frequency of requests to DynamoDB by implement ng exponential backoff.
  4. Increase the frequency of requests to DynamoDB by decreasing the retry delay.
  5. Change the capacity mode of the DynamoDB table from provisioned to on-demand.

Question 84

A developer is deploying on application on Amazon EC2 instances that run in Account A. In certain cases, this application needs to read data from a private Amazon S3 bucket in Account B. The developer must provide the application access to the S3 bucket without exposing the S3 bucket to anyone else. Which combination of actions should the developer take to meet these requirements? (Choose two.)

  1. Create an IAM role with S3 read permissions in Account B.
  2. Update the instance profile IAM role in Account A with S3 read permissions.
  3. Make the S3 bucket public with limited access for Account A.
  4. Configure the bucket policy in Account B to grant permissions to the instance profile role.
  5. Add a trust policy that allows s3:Get* permissions to the IAM rote in Account B.

Question 85

A developer at a company recently created a serverless application to process and show data from business reports. The application's user interface (UI) allows users to select and start processing the flies. The UI displays a message when the result is available to view. The application uses AWS Step Functions with AWS Lambda functions to process the files. The developer used Amazon API Gateway and Lambda functions to create an API to support the UI. The company's UI team reports that the request to process a file s often returning timeout errors because of the size or complexity of the files. The UI team wants the API to provide an immediate response so that the UI can display a message while the files are being processed. The backend process that is invoked by the API needs to send an email message when the report processing is complete. What should the developer do to configure the API to meet these requirements?

  1. Change the API Gateway route to add an X-Amz-Invocation-Type header with a static value of 'Event' in the integration request. Deploy the API Gateway stage to apply the changes.
  2. Change the configuration of the Lambda function that implements the request to process a file. Configure the maximum age of the event so that the Lambda function will run asynchronously.
  3. Change the API Gateway timeout value to match the Lambda function timeout value. Deploy the API Gateway stage to apply the changes.
  4. Change the API Gateway route to add an X-Amz-Target header with a static value of 'Async' in the integration request. Deploy the API Gateway stage to apply the changes.