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CLF-C02 practice question: Benefits of the AWS Cloud (1 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.

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A hospital runs an online appointment-booking service for patients.

Bookings must keep working if a single server fails or if an entire data center loses power, so the hospital cannot depend on any one facility.

Which cloud concept describes this goal?

Choose one answer.

  1. A. High availability, so the service keeps running when a component or facility fails
  2. B. Elasticity, so capacity grows and shrinks automatically as demand changes throughout the day
  3. C. Economies of scale, so AWS pools usage across customers and unit prices fall over time
  4. D. Agility, so new resources can be provisioned in minutes instead of weeks or months
Show the answer and explanation

Answer: A

  • A. Right: Correct. High availability means designing a workload so it keeps operating through the failure of a single component, server or facility. Spreading resources across several Availability Zones is the usual way to achieve it.
  • B. Wrong: Elasticity adjusts capacity to match demand, adding servers at busy times and removing them when load falls. It is about matching load, not about surviving a failed server or data center.
  • C. Wrong: Economies of scale explain how AWS lowers prices because usage from many customers is combined. It is a pricing benefit and does nothing to keep the booking service running during a failure.
  • D. Wrong: Agility means new IT resources can be created quickly, which speeds up projects and experiments. Fast provisioning helps recovery, but agility is not the concept that describes running through a failure.

Explanation

High availability is the goal of keeping a workload running despite the failure of individual components or whole facilities. Designing across several Availability Zones is how AWS customers achieve it. Elasticity, economies of scale and agility are real cloud benefits, but each describes a different outcome.

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