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CLF-C02 practice question: Cloud economics (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.

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A company keeps 80 TB of product images on a file server that it runs on Amazon EC2.

Its administrators spend most of their time adding disks, planning capacity and copying backups.

The company wants to store the images without buying or managing storage servers, and to pay only for the data it stores.

Which option is the best fit?

Choose one answer.

  1. A. Larger Amazon EBS volumes attached to the same EC2 instance, with more disks added as needed
  2. B. Amazon S3, which needs no capacity bought in advance and charges for what is used
  3. C. EC2 instance store volumes on the same instances, which give fast local disks
  4. D. A second file server on EC2 in another Region, copied from the first
Show the answer and explanation

Answer: B

  • A. Wrong: Larger EBS volumes still attach to one instance that the company runs and manages. Its administrators would keep adding disks and planning capacity, so this does not remove the effort.
  • B. Right: Correct. Amazon S3 is an object storage service. Customers do not have to purchase a predetermined amount of storage in advance, and they pay for what they store, so no storage servers need to be managed. Learn more: What is Amazon S3? (opens in a new tab)
  • C. Wrong: Instance store is temporary block storage attached to the host, meant for buffers, caches and scratch data. It is not a durable home for product images, and the company would still run the servers.
  • D. Wrong: A second EC2 file server in another Region doubles the servers the company must run and copy backups for. It does not remove the management work the scenario describes.

Explanation

Amazon S3 is designed for storing large amounts of data as objects without the customer provisioning capacity or running storage servers, and it charges for what is used. EBS, instance store and a second EC2 file server all keep the company responsible for the disks and servers it runs.

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