What is a key consideration when using Reserved Instances in cloud computing?

What is a key consideration when using Reserved Instances in cloud computing?

• A. They involve no upfront payment
• B. They involve upfront payment for a committed period with potential cost savings
• C. They have no capacity reservations
• D. They are only for development workloads

Answer: (B)

Reserved Instances lock in a discounted price by requiring you to commit to using a specific instance type in a chosen region for a set term, with upfront payment (either all upfront or partial) in exchange for lower hourly rates. The essential idea is that you pay now to secure capacity and a lower price over the term, so you only get the savings if you actually run that capacity for the whole period. This makes it ideal for steady, predictable workloads rather than short-lived or exploratory tasks. The statement that there’s no upfront payment is incorrect because the model relies on some upfront or committed payment to achieve the discount. It’s also not limited to development workloads, since any predictable, long-running workload can benefit. Finally, while Reserved Instances don’t guarantee capacity, they’re a pricing option, and capacity reservations are a separate feature if you need guaranteed access.

Reserved Instances lock in a discounted price by requiring you to commit to using a specific instance type in a chosen region for a set term, with upfront payment (either all upfront or partial) in exchange for lower hourly rates. The essential idea is that you pay now to secure capacity and a lower price over the term, so you only get the savings if you actually run that capacity for the whole period. This makes it ideal for steady, predictable workloads rather than short-lived or exploratory tasks. The statement that there’s no upfront payment is incorrect because the model relies on some upfront or committed payment to achieve the discount. It’s also not limited to development workloads, since any predictable, long-running workload can benefit. Finally, while Reserved Instances don’t guarantee capacity, they’re a pricing option, and capacity reservations are a separate feature if you need guaranteed access.