A company is experiencing growth as demand for its product has increased The company’s existing purchasing application is slow when traffic spikes The application is a monolithic three tier application that uses synchronous transactions and sometimes sees bottlenecks in the application tier A solutions architect needs to design a solution that can meet required application response times while accounting for traffic volume spikes.
Which solution will meet these requirements?
A . Vertically scale the application instance using a larger Amazon EC2 instance size.
B . Scale the application’s persistence layer horizontally by introducing Oracle RAC on AWS
C . Scale the web and application tiers horizontally using Auto Scaling groups and an Application Load Balancer
D . Decouple the application and data tiers using Amazon Simple Queue Service (Amazon SQS) with asynchronous AWS Lambda calls.
Answer: A
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