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Q: Which one of the following is an input device?
  • A. Speaker
  • B. Key-board
  • C. Plotter
  • D. Printer
Correct Answer: Option B - In the given options, key board is an input device use to enter characters and functions into the computer system by processing buttons or keys. It contains many types of keys. It is simplest and most used input device to input data into the computer.
B. In the given options, key board is an input device use to enter characters and functions into the computer system by processing buttons or keys. It contains many types of keys. It is simplest and most used input device to input data into the computer.

Explanations:

In the given options, key board is an input device use to enter characters and functions into the computer system by processing buttons or keys. It contains many types of keys. It is simplest and most used input device to input data into the computer.