AWS Certified Cloud Practitioner (CLF-C02) — Question 82

A company runs thousands of simultaneous simulations using AWS Batch. Each simulation is stateless, is fault tolerant, and runs for up to 3 hours.
Which pricing model enables the company to optimize costs and meet these requirements?

Answer options

• A. Reserved Instances
• B. Spot Instances
• C. On-Demand Instances
• D. Dedicated Instances

Correct answer: B

Explanation

Spot Instances are the most cost-effective option for running simulations that are fault tolerant and can be interrupted, as they allow users to bid on unused capacity at lower prices. Reserved Instances and On-Demand Instances do not provide the same cost savings for transient workloads, and Dedicated Instances are more expensive as they run on dedicated hardware.