Exams / CLF-C02 / Cloud economics / Question 4
CLF-C02 practice question: Cloud economics (4 of 4)
Cloud Concepts 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 bought enough servers for its data centre to cope with its busiest week of the year. For the rest of the year most of those servers sit idle. How does moving to AWS change this situation?
Choose one answer.
- AA. The company must still buy capacity for its peak week, but AWS stores the servers for it.
- BB. It can scale capacity up for the busy week and down afterwards, paying only for use.
- CC. AWS charges a single fixed price per year whatever the company uses.
- DD. AWS guarantees that the company's demand will never exceed a set limit.
Show the answer and explanation
Answer: B
- A. Wrong: On AWS you do not buy servers in advance. You provision capacity when you need it and release it afterwards.
- B. Right: Correct. On AWS you stop guessing capacity: you use as much or as little as you need and pay only for what you consume.
- C. Wrong: AWS pricing is mainly pay-as-you-go. A fixed annual price would not reduce the cost of idle capacity.
- D. Wrong: AWS does not limit or predict a customer's demand. The benefit is that capacity can follow demand.
Explanation
On premises, capacity has to be bought for the peak, so it is idle for much of the year. In the cloud you stop guessing capacity: you scale up for busy periods and scale back down afterwards. Combined with pay-as-you-go pricing, this turns a large fixed cost into a variable one that tracks actual use.
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