What is CPU (central processing unit) and why it is important?

Device consisting of electronic circuitry that executes instructions to process data.


CPU is important because it is considered as brain of computer.


CPU performs arithmetic and logical calculations and controls the operations of other part of computer.


CPU may be single silicon chip or a


series of chips .


A chip contains thousands of electronic switching circuits.


The CPU consists of ALU, REGISTERS, CONTROL UNIT, INTERNAL BUS.


ALU carries arithmetic and logical operations .


Registers store data and keep track of operations.


Control unit controls and regulates various operations.


Internal Bus connects the unit of the CPU with each other and with external components of system.