Correct Answer - Option 3 : Central Processing Unit
Input Devices:
- Input devices are the component of the computer system that accepts incoming data and instructions.
- It converts them into a pattern of electrical signals in binary code that is understandable to a digital computer.
Output Devices:
- Output devices are the component of a computer system that converts the digitized signals into a form understandable to the user.
- The output devices are generally known as the reverse of input devices.
- Output devices also send data from one computer system to another.
- A Visual Display Unit (VDU) is also referred to as a Monitor and VDU (video display unit), a monitor is an output device that displays video images and text.
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A printer is an external hardware output device that takes the electronic data stored on a computer or other device and generates a hard copy.
- A floppy disk is a type of disk storage composed of a disk of thin and flexible magnetic storage medium, sealed in a rectangular plastic enclosure lined with fabric that removes dust particles. It can be both an input and output device.
The Central Processing Unit (CPU):
- The CPU is the brain of the computer.
- Sometimes referred to simply as the processor or central processor, the CPU is where most calculations take place.
- The CPU executes the programs and controls the operation of all the hardware.
- A central processing unit (CPU), also called a central processor, main processor, or just processor is the electronic circuitry that executes instructions comprising a computer program.
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The CPU performs basic arithmetic, logic, controlling, and input/output (I/O) operations specified by the instructions in the program.
Thus, CPU is not a computer output device.
- The question is "Which one is not a computer output device?"
- Floppy is both input and output.
- CPU is the only option that is not an output device.
The basic difference between Input and Output devices:
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INPUT DEVICE
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OUTPUT DEVICE
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It accepts data from the user.
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It reflects processed data to the user.
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It is directly commanded by the user.
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It is commanded by the processor.
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It converts user-friendly instruction into a machine friendly.
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It converts the machine’s instructions to user intelligible.
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It takes the data from the user and sends it to the processor for execution.
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It takes the processed data from the processor and sends it back to the user.
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It helps the computer is accepting the data.
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It helps the computer is displaying the data.
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The design of input devices is more complex.
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The design of output devices is less complex.
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Ex: Keyboard, Image Scanner, Microphone, Pointing device, Graphics tablet, Joystick, Mouse, CPU
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Ex: Monitor, Printers, Plotters, Projector, Speakers.
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