Exams / CLF-C02 / Benefits of the AWS Cloud / Question 3
CLF-C02 practice question: Benefits of the AWS Cloud (3 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 runs a reporting job every night that needs 40 servers for about two hours. For the rest of the day the job needs no servers at all. The company wants capacity to be added for the job and released afterwards so it does not pay for idle servers. Which cloud characteristic does this rely on?
Choose one answer.
- AA. Fault tolerance
- BB. Durability
- CC. Data sovereignty
- DD. Elasticity
Show the answer and explanation
Answer: D
- A. Wrong: Fault tolerance is about continuing to operate when components fail. The scenario is about matching capacity to a predictable daily pattern of demand.
- B. Wrong: Durability describes how well stored data is protected from loss. It has nothing to do with adding and removing compute capacity.
- C. Wrong: Data sovereignty is about keeping data within a particular country or jurisdiction, not about scaling capacity up and down.
- D. Right: Correct. Elasticity is the ability to acquire resources when needed and release them when they are no longer needed, so you pay only for what you use.
Explanation
Elasticity means capacity grows and shrinks with demand, often automatically through services such as Amazon EC2 Auto Scaling. Because AWS bills for what you use, releasing the 40 servers after the job finishes means the company stops paying for them, which is not possible with servers bought for a data centre.
Study
Keep practising
Answer questions with a score at the end, or practise just this topic with the explanation after each one. No sign-up needed.