A company wants to move a multi-tiered application from on premises to the AWS Cloud to improve the application's performance. The application consists of application tiers that communicate with each other by way of RESTful services. Transactions are dropped when one tier becomes overloaded. A solutions architect must design a solution that resolves these issues and modernizes the application.
Which solution meets these requirements and is the MOST operationally efficient?

• A.Use Amazon API Gateway and direct transactions to the AWS Lambda functions as the application layer. Use Amazon Simple Queue Service (Amazon SQS) as the communication layer between application services. Most Voted
• B.Use Amazon CloudWatch metrics to analyze the application performance history to determine the server's peak utilization during the performance failures. Increase the size of the application server's Amazon EC2 instances to meet the peak requirements.
• C.Use Amazon Simple Notification Service (Amazon SNS) to handle the messaging between application servers running on Amazon EC2 in an Auto Scaling group. Use Amazon CloudWatch to monitor the SNS queue length and scale up and down as required.
• D.Use Amazon Simple Queue Service (Amazon SQS) to handle the messaging between application servers running on Amazon EC2 in an Auto Scaling group. Use Amazon CloudWatch to monitor the SQS queue length and scale up when communication failures are detected.

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Your system recently experienced down time during the troubleshooting process. You found that a new administrator mistakenly terminated several production EC2 instances.
Which of the following strategies will help prevent a similar situation in the future?
The administrator still must be able to:
-launch, start stop, and terminate development resources.
-launch and start production instances.

• A.Leverage EC2 termination protection and multi-factor authentication, which together require users to authenticate before terminating EC2 instances
• B.Create an IAM user, which is not allowed to terminate instances by leveraging production EC2 termination protection.
• C.Leverage resource based tagging along with an IAM user, which can prevent specific users from terminating production EC2 resources.
• D.Create an IAM user and apply an IAM role which prevents users from terminating production EC2 instances.

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Does Amazon RDS API provide actions to modify DB instances inside a VPC and associate them with DB Security Groups?

• A.Yes, Amazon does this but only for MySQL RDS.
• B.Yes
• C.No
• D.Yes, Amazon does this but only for Oracle RDS.

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A company has a mobile chat application with a data store based in Amazon DynamoDB. Users would like new messages to be need with as little latency as possible. A possible architect needs design an optimal solution that requires minimal application changes.
Which method should the solution architect select?

• A.Configure amazon DynamoDB Accelerator (DAX) for the new messages table. Update the code to use DAX endpoint.
• B.AddDynamoDB read replicas to handle the increased read lead the application to point to the read endpoint for the read replicas.
• C.Add an Amazon ElastiCache for Redis cache to the application stack. Update the application to point to the Redis cache endpoint of DynamoDB.
• D.Double the number of read capacity units for the new messages table in DynamoDB. Continue to use the existing DynamoDB endpoint.

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A company is moving its data management application to AWS. The company wants to transition to an event-driven architecture. The architecture needs to the more distributed and to use serverless concepts whit performing the different aspects of the workflow. The company also wants to minimize operational overhead.
Which solution will meet these requirements?

• A.Build out the workflow in AWS Step Functions Deploy the application on Amazon EC2 Instances Use Step Functions to invoke the workflow steps on the EC2 instances
• B.Build out the workflow in Amazon EventBridge. Use EventBridge to invoke AWS Lambda functions on a schedule to process the workflow steps.
• C.Build out the workflow in AWS Glue Use AWS Glue to invoke AWS Lambda functions to process the workflow slaps
• D.Build out the workflow m AWS Step Functions Use Step Functions to create a stale machine Use the stale machine to invoke AWS Lambda functions to process the workflow steps

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