Your company is planning to offload some of the batch processing workloads on to AWS. These jobs can be interrupted and resumed at any time. Which of the following instance types would be the most cost-effective to use for this purpose?

Answer options:

A.On-Demand
B.Spot
C.Full Upfront Reserved
D.Partial Upfront Reserved

Answer – B
The AWS documentation mentions the following:
Spot Instances are a cost-effective choice if you can be flexible about when your applications run and if your applications can be interrupted. For example, Spot Instances are well-suited for data analysis, batch jobs, background processing, and optional tasks.
For more information on AWS Spot Instances, please refer to the below URL:
http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/using-spot-instances.html