Draw block diagram of computer and explain the function of various unit
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Answer:
The block diagram of a computer represents the various units present in the computer. There are mainly 5 units in a computer.
- Input unit
- Output unit
- Memory unit
- Arithmetic and Logic unit
- Control Unit
INPUT UNIT
It helps in maintaining the input devices of a computer. The input devices are used to input data into the computer. The examples of input devices are mouse, keyboard, joystick, light pen etc.
OUTPUT UNIT
It helps in the maintanence of output devices. The output devices are used to display the results on the screen so that it can be seen by the user. The examples of output devices are monitor, printer, plotter etc.
MEMORY UNIT
The information in computer is stored in the memory. There are 2 types of memory-Primary memory and Secondary memory. Primary memory is also called RAM and is volatile. The main disadvantage of primary memory is that the data will be lost when power fails. Thus the data in primary memory is temporary. Secondary memory is non volatile. The advantage of secondary memory is that the data will never be lost even if the power fails. Thus the data stored in secondary memory will be permanent. The examples of secondary memory are pen drive, cd, dvd etc.
ARITHMETIC AND LOGIC UNIT
The Arithmetic and Logic Unit is used to perform the operations such as addition, subtraction, multiplication, division etc as well the logical operations such as comparison, >=, <=, = etc.
CONTROL UNIT
It is known as the brain of the computer.It is responsible for coordinating all the tasks.
Answer:
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