A Company Has a Live Chat Application Running on Its

question 548

Multiple Choice

A company has a live chat application running on its on-premises servers that use WebSockets. The company wants to migrate the application to AWS. Application traffic is inconsistent, and the company expects there to be more traffic with sharp spikes in the future. The company wants a highly scalable solution with no server maintenance nor advanced capacity planning. Which solution meets these requirements?

• A) Use Amazon API Gateway and AWS Lambda with an Amazon DynamoDB table as the data store. Configure the DynamoDB table for provisioned capacity.
• B) Use Amazon API Gateway and AWS Lambda with an Amazon DynamoDB table as the data store. Configure the DynamoDB table for on-demand capacity.
• C) Run Amazon EC2 instances behind an Application Load Balancer in an Auto Scaling group with an Amazon DynamoDB table as the data store. Configure the DynamoDB table for on-demand capacity.
• D) Run Amazon EC2 instances behind a Network Load Balancer in an Auto Scaling group with an Amazon DynamoDB table as the data store. Configure the DynamoDB table for provisioned capacity.

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Definitions:

Biceps Femoris

A muscle of the posterior thigh that is involved in knee flexion and thigh extension, part of the hamstring group.

Gracilis

A thin, strap-like muscle in the inner thigh that helps in the adduction of the leg.

Semimembranosus

One of the three hamstring muscles at the back of the thigh, involved in knee flexion and hip extension.

Semitendinosus

A muscle in the thigh, part of the hamstrings group, which functions in knee flexion and thigh extension.