what is operating system? what are goals and functions of operating system?

 

Operating system in computer system

Have you ever thought how computer understand your command/instructions? or how it process you single click ?. there is always needed and interface to user to talk with or to handle the devices and these interface is called OS(operating system). many companies are working to make this interface easy for the users as command will be hard for general user. hence operating system can be defined as a collection of software that manages computer hardware resources and provides computer services for computer programs. There are many companies which are working to make that possible easy to use .The basic knowledge can be gained by follow diagram as below

overview of OS

• OS is an interface between computer user and computer hardware

•         OS is a software which performs basic tasks like file management, memory management, memory management, process management, I/O management and controlling peripheral devices such as disk drivers and printers.

        Examples of OS are: Windows, Linus, Unix, Dos etc.

Main goal of OS:

•        Primary goal: to make convenient for the user .This is the primary goal of OS .This means providing user friendly environment for the user that he/she can access hardware easily.
•        Secondary goal: The secondary goal of OS is to give maximum efficiency. The no of task executed per second must be more to give more efficiency for CPU.

function/component/concept of OS:

1. Process management
2.    Memory management
3.  Device management
4.    File management
5.    Security management
6. Control over system performance
7.  Job accounting
8. Error detecting aids
9. Coordination between other software and user software