Operating System and functions of operating system

Operating System

• Operating system is a software program that controls internal activities of the computer hardware and provide user interface .
• Application programs need to interact with the operating system for being hardware resources .
• OS is the first program loaded in the memory after the computer is switched on. 
• One of the primary functions of the o.s. is to provide an interface b/w the user and hardware .
• This interface enables a user to use hardware resources efficiently.

Function of operating system:

1) Processor management: 

The operating system assigns a processor (If a computer has more than one processor) to the different tasks that must be performed by the computer.

2) memory management: 

OS allocates the main memory and secondary memory to the system program, user program and data.

3) File management: 

The O.S. is responsible for managing program files by default and also user files.

4) I/O management:

The OS is also responsible for all the input output devices such as mouse, keyboard, printer, web camera that are working properly or not.

5) Security management: 

OS stabilizes data security such that it keeps different programs and their data in such a manner that do not interface with each other. .It also protect data from being destroyed by any other user.