Q504. A solutions architect is designing a data processing system that will use Amazon EC2 instances. Data that needs to be processed will wait in an Amazon Simple Queue Service (Amazon SQS) queue. At least two data processing instances must run at all times.Which combination of actions will meet these requirements MOST cost-effectively? (Select TWO.)
A.Create a Spot Fleet with a target scaling policy that targets the acceptable backlog per instance.Request two On-Demand Instances for minimum capacity. Use Spot Instances for additional capacity. B.Purchase two Reserved Instances for the target platform and instance type in the target Aws Region C.Create On-Demand Capacity Reservations for two instances for the target platform and instance type in the target AWS Region. D.Create an Auto Scaling group that uses Spot Instance requests. Configure the scaling policy to scale with the size of the SQS queue. Set the minimum value to 2. E.Provision two Dedicated Hosts. Configure AWS Batch to use Spot Instances to supply additional capacity.正确答案BD
