AWS Certified Cloud Practitioner — Question 808

What is the recommended use case for Amazon EC2 On-Demand Instances?

Answer options

• A. A steady-state workload that requires a particular EC2 instance configuration for a long period of time
• B. A workload that can be interrupted for a project that requires the lowest possible cost
• C. An unpredictable workload that does not require a long-term commitment
• D. A workload that is expected to run for longer than 1 year

Correct answer: C

Explanation

Amazon EC2 On-Demand Instances are ideal for unpredictable, short-term workloads because they provide pay-as-you-go pricing with no long-term contracts or upfront commitments. For steady-state or long-term workloads running over a year, Savings Plans or Reserved Instances are more cost-effective. If the workload is flexible and can tolerate interruptions, Spot Instances would be the recommended choice for the lowest possible cost.