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Mobile Technology, Data Mining and Cloud Computing

What cloud computing is

  • 3 things to know
  • A2 Unit 1

Overview

Cloud computing, main characteristics that distinguish a cloud service and what on-demand self-service means.

What you need to know

Answer each one before you reveal it.

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Key term

State the main characteristics that distinguish a cloud service.

Key term

What is meant by cloud computing?

Key term

What is elasticity in cloud computing?

Questions from this subtopic

Each one with the model answer underneath.

  1. 1

    What is meant by cloud computing?

    Model answer

    Cloud computing is the delivery of computing resources such as processing, storage and applications as a service over a network, so a customer uses them on demand instead of buying and running the equipment.

  2. 2

    State the main characteristics that distinguish a cloud service.

    Model answer

    A cloud service offers self-service provisioning on demand, access over a network from many kinds of device, resources pooled between customers, capacity that expands and contracts rapidly, and charging by measured use.

  3. 3

    Explain what on-demand self-service means.

    Model answer

    On-demand self-service means a customer can create another server or add storage through a control panel within minutes, without placing an order or waiting for an engineer to install anything.

  4. 4

    What is elasticity in cloud computing?

    Model answer

    Elasticity is the ability to add capacity when demand rises and release it again when demand falls, so a retailer pays for extra servers only during the weeks it actually needs them.

  5. 5

    How does metered charging change the cost of computing for a business?

    Model answer

    Metered charging bills for what is consumed, such as gigabytes stored and processor hours used, which turns a large capital purchase of hardware into a running cost that follows the level of activity.

  6. 6

    What is multi-tenancy?

    Model answer

    Multi-tenancy is the sharing of the same physical hardware by several customers. Each customer's data and processing are kept logically separate, and sharing is what makes the cost per customer low.

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