2. Data

Post date: 30-Oct-2014 17:48:42


Data is a collection of raw facts, figures or instructions that do not have much meaning to the user.

Data may be in form of numbers, alphabets/letters or symbols, and can be processed to produce information.


There are two types/forms of data:

a). Digital (discrete) data:

  • Digital data is discrete in nature. It must be represented in form of numbers, alphabets or symbols for it to be processed by a computer.
  • - Digital data is obtained by counting. E.g. 1, 2, 3 …

b). Analogue (continuous) data:

  • Analogue data is continuous in nature. It must be represented in physical nature in order to be processed by the computer.
  • Analogue data is obtained by measurement. E.g. Pressure, Temperature, Humidity, Lengths or currents, etc
  • The output is in form of smooth graphs from which the data can be read.

Data Processing:

  • It is the process of collecting all items of data together & converting them into information.
  • Processing refers to the way the data is manipulated (or handled) to turn it into information.
  • The processing may involve calculation, comparison or any other logic to produce the required result. The processing of the data usually results in some meaningful information being produced.

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