What is CPU? What are the functions of CPU?

CPU (Central Processing Unit):

CPU or central processing unit is an electronic circuitry that carries out the instruction given by a computer program. CPU execute instruction by performing basic arithmetic, logical, control and I/O operations as required per instruction. CPU is considered to be the brain of the computer. The speed and efficiency of a computer mostly depends that of it's CPU.

Suggesting Reading:

1. What are the steps followed by a CPU to execute an instruction?

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Functions of CPU: 

Among various functions of CPU some are as follows

1. Controlling all other parts of the machine and sending timing signals.
2. Transferring data between memory and I/O devices
3. Fetching data and instructions from memory
4. Decoding instruction
5. Performing arithmetical and logical operations
6. Executing programs stored in memory
7. Performing communication among the I/O devices etc.

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Author: Tanmay Chakrabarty

A former CSE student, working as a SSE with 5+ years of experience in the field of Web Application development in PHP+MySQL platform with strong skills in JS, JQuery(+UI), HTML, CSS, Bootstrap.