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Question 56

A developer is deploying an 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? (Select TWO.)

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

Question 57

A developer is creating a Ruby application and needs to automate the deployment, scaling, and management of an environment without requiring knowledge of the underlying infrastructure.
Which service would best accomplish this task?

A.AWS Elastic Beanstalk
B.AWS CloudFormation
C.AWS OpsWorks
D.AWS CodeDeploy

Question 58

A banking company is building an application for users to create accounts, view balances, and review recent transactions. The company integrated an Amazon API Gateway REST API with AWS Lambda functions. The company wants to deploy a new version of a Lambda function that gives customers the ability to view their balances. The new version of the function displays customer transaction insights. The company wants to test the new version with a small group of users before deciding whether to make the feature available for all users. Which solution will meet these requirements with the LEAST disruption to users?

A.Create a canary deployment for the REST API. Gradually increase traffic to the new version of the function. Revert traffic to the old version if issues are detected.
B.Redeploy the REST API stage to use the new version of the function. If issues are detected, update the REST API to point to the previous version of the function.
C.Deploy the new version of the function to a new stage in the REST API. Route traffic to the new stage. If the new version fails, route traffic to the original stage.
D.Create a new REST API stage for the new version of the function. Create a weighted alias record set in Amazon Route 53 to distribute traffic between the original stage and the new stage.

Question 59

A developer wants to use an AWS AppSync API to invoke AWS Lambda functions to return data. Some of the Lambda functions perform long-running processes. The AWS AppSync API needs to return responses immediately.
Which solution will meet these requirements with the LEAST operational overhead?

A.Configure the Lambda functions to be AWS AppSync data sources. Use Event mode for asynchronous Lambda invocation.
B.Increase the timeout setting for the Lambda functions to accommodate longer processing times.
C.Set up an Amazon SQS queue. Configure AWS AppSync to send messages to the SQS queue.
Configure a Lambda function event source mapping to poll the queue.
D.Enable caching, and increase the duration of the AWS AppSync cache TTL.

Question 60

A developer uses AWS CloudFormation to deploy an Amazon API Gateway API and an AWS Step Functions state machine. The state machine must reference the API Gateway API after the CloudFormation template is deployed. The developer needs a solution that uses the state machine to reference the API Gateway endpoint.
Which solution will meet these requirements MOST cost-effectively?

A.Configure the CloudFormation template to store the API endpoint in a standard AWS::SecretsManager::Secret resource. Configure the state machine to reference the resource.
B.Configure the CloudFormation template to store the API endpoint in a standard AWS::AppConfig::ConfigurationProfile resource. Configure the state machine to reference the resource.
C.Configure the CloudFormation template to store the API endpoint in an environment variable for the AWS::StepFunctions::StateMachine resource. Configure the state machine to reference the environment variable.
D.Configure the CloudFormation template to reference the API endpoint in the DefinitionSubstitutions property for the AWS::StepFunctions::StateMachine resource.