Exams / CLF-C02 / Compute purchasing options / Question 1
CLF-C02 practice question: Compute purchasing options (1 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 wants a three-year commitment discount for its Amazon EC2 instances, but it expects to change instance family and operating system during the term as its applications evolve. Which Reserved Instance type allows these changes?
Choose one answer.
- AA. Standard Reserved Instances
- BB. Zonal Reserved Instances bought for a single Availability Zone
- CC. Spot Instances bought for three years
- DD. Convertible Reserved Instances
Show the answer and explanation
Answer: D
- A. Wrong: Standard Reserved Instances give a bigger discount but cannot be exchanged for different attributes such as instance family.
- B. Wrong: Scope does not solve the problem. A zonal reservation is still tied to its instance attributes.
- C. Wrong: Spot Instances use spare capacity at a variable price and are not bought for a term.
- D. Right: Correct. Convertible Reserved Instances can be exchanged during the term for others with a different instance family, type, platform, scope or tenancy.
Explanation
Reserved Instances come in two offering classes. Standard Reserved Instances offer the larger discount and can be sold in the Reserved Instance Marketplace, but cannot be exchanged. Convertible Reserved Instances offer a smaller discount in return for being exchangeable during the term for different attributes, which suits workloads that are expected to change.
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