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Which of the following does NOT represent on I/O device?
1. Speaker which beeps
2. Joystick
3. Plotter
4. ALU
5. None of these

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Correct Answer - Option 4 : ALU

The correct answer is ALU.

  • The ALU is a complex digital circuit, one of many components within a computer's central processing unit.
  • The full form of ALU is the Arithmetic and Logical Unit.
  • It performs both bitwise and mathematical operations on binary numbers and is the last component to perform calculations in the processor.
  • The ALU uses operands and code that tells it which operations to perform for input data.
  • After the information is processed by the ALU, it's sent to the computer's memory.

Device  Use
Speaker  A computer speaker is an output hardware device that connects to a computer to generate sound.
Joystick A joystick is an input device that controls a character or machine in a computer program, such as a plane in a flight simulator.
Plotter A plotter is a computer hardware device much like a printer that is used for printing vector graphics.

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