Question

What are the basic component of computer system dicuss in detail?

Answer 1

DETAILED ANSWER :

• Input Unit

An input unit performs the following functions:

1. It accepts (or reads) the list of instructions and data from the outside world.
2. It converts these instructions and data in computer acceptable format.
3. It supplies the converted instructions and data to the computer system for further processing.

• Output Unit

The job of an output unit is just the reverse of that of an input unit. It supplied information and results of computation to the outside world. Thus it links the computer with the external environment.

• Storage Unit

Functions of the storage unit are to store:

1. All the data to be processed and the instruction required for processing (received from input devices).
2. Intermediate results of processing.
3. Final results of processing before these results are released to an output device.

• Central Processing Unit (CPU)

The main unit inside the computer is the CPU. This unit is responsible for all events inside the computer. It controls all internal and external devices, performs “Arithmetic and Logical operations”.

• Arithmetic And Logic Unit (ALU)

The arithmetic and logic unit (ALU) of a computer system is the place where the actual execution of the instructions take place during the processing operations. All calculations are performed and all comparisons (decisions) are made in the ALU.

• Control Unit

Control unit acts as a central nervous system for the other components of the computer. It manages and coordinates the entire computer system. It obtains instructions from the program stored in main memory, interprets the instructions, and issues signals that cause other units of the system to execute them.

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Answer 2

Answer:

A computer system comprises of five basic components :

• Input Unit - It is responsible for taking input for the computer. The input devices attached to the computer system make the input unit.

• Output Unit - It is responsible giving output from the computer. The output devices attached to the computer make the output unit.

• Central Processing Unit (CPU) - It is responsible for processing the data and instructions. It comprises of two parts :

            i) Arithmetic and Logic Unit (ALU) -it is responsible for carrying out    the arithmetic instructions (add, subtract, multiply and divide) and making logical decisions(greater than, less than, equal to).

          ii) Control Unit (CU) - It is responsible for controlling and supervising the processing.

• Primary Memory - It is the internal volatile memory where data and instructions are stored during processing.
• Secondary Storage Unit - It refers to the external storage devices which provide permanent memory to the computer system.