CLF-C02 practice question: Compute purchasing options (2 of 2)
Billing, Pricing, and Support A free question from our original CLF-C02 practice exam. Try it, then open the answer to see why each option is right or wrong.
A company must be sure it can launch 20 Amazon EC2 instances of one type in a single Availability Zone for a planned two-week event.
It does not want a one-year or three-year commitment, and having the capacity guaranteed matters more than a discount.
Which option should it use?
Choose one answer.
AA. On-Demand Capacity Reservations in that zone
BB. Spot Instances booked for that Availability Zone
CC. Compute Savings Plans for the two-week event period
DD. Regional Reserved Instances for the whole Region
Show the answer and explanation
Answer: A
A. Right: Capacity Reservations reserve EC2 capacity in a specific Availability Zone with no commitment term. The company pays while the reservation is active, and it cancels when the event ends. Learn more: Capacity Reservations (opens in a new tab)
B. Wrong: Spot capacity is spare, and AWS can reclaim it at short notice. It cannot guarantee that all 20 instances launch.
C. Wrong: Savings Plans require a one- or three-year commitment to an hourly spend, and they do not reserve capacity in any zone.
Capacity Reservations are the only option that guarantees capacity in a chosen Availability Zone without a one- or three-year term. Spot can be reclaimed, Savings Plans and Regional Reserved Instances give discounts on usage rather than reserved capacity, and they need a term commitment.
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