Answer: Reserved Instances

For a steady and consistent workload that is expected to run for at least one year, the most cost-effective purchasing option is Reserved Instances (RIs). Reserved Instances provide a significant discount (up to 75%) compared to On-Demand pricing, in exchange for a commitment to a specific instance for a term of 1 or 3 years. This is ideal for predictable workloads that are expected to run continuously over the term of the reservation. Spot Instances can be cost-effective for flexible workloads that can be interrupted, but they do not provide the same level of cost savings for steady workloads. On-Demand Instances are more expensive and do not offer the same discounts as Reserved Instances. Dedicated Hosts provide dedicated physical servers, but they are typically more expensive than Reserved Instances for steady workloads.

Author: LeetQuiz Editorial Team