What is the recommended use case for Amazon EC2 On-Demand Instances?
A steady-state workload that requires a particular EC2 instance configuration for a long period of time
A workload that can be interrupted for a project that requires the lowest possible cost
An unpredictable workload that does not require a long-term commitment
A workload that is expected to run for longer than 1 year
Explanations:
On-Demand Instances are not ideal for steady-state workloads that require a specific configuration for an extended period, as Reserved Instances would be more cost-effective in such scenarios.
This describes a workload suited for Spot Instances, which offer the lowest cost but can be interrupted. On-Demand Instances are priced higher without interruption risk.
On-Demand Instances are ideal for unpredictable workloads without long-term commitments, as they allow for flexibility in scaling and pricing on an as-needed basis.
For workloads expected to run longer than a year, Reserved Instances are more appropriate due to their cost savings over long-term commitments compared to On-Demand pricing.
To the best of my knowledge, the answer is:
An unpredictable workload that does not require a long-term commitment