Question

What is the work of central Processing Unit.

Answer 1

The central processing unit (CPU) of a computer is a piece of hardware that carries out the instructions of a computer program. It performs the basic arithmetical, logical, and input/output operations of a computer system. ... The CPU is sometimes also referred to as the central processor unit, or processor for short.

Answer 2

The CPU is the part of a computer that performs the main function of information processing. This memory unit stores data. The computer supplies processed information back to the users using special output devices.
The CPU, is the most important part of the computer. It is called the brain of the computer. It makes all the required calculations and processes data.
The CPU is divided into three main components:-
ALU: ALU stands for arithmetic and logic unit it performs all the mathematical and logical operations on the information supplied to CPU.
CU:- CU stands for control unit This unit directs the working of CPU. It fetches instructions (programs) from the memory and according to the instructions, controls the flow of data between the ALU and other parts on the computer.
Registers:- Registers are storage locations that hold instructions or data while the CPU is using them. The registers consist flip flops and the registers used by the CPU are the fastest memory elements in the computer. In contrast, the memory unit holds instructions and data before or after the CPU processes these.