Q. What is Operating System?
Ans. :- It is a system software which provides an interface between computer user and hardware with the help of application software.
In sort we can say that " The software that operates the computer system is known as Operating System (OS)" .
Source:- tutorialspoint
Some popular Operating Systems as Windows, Linux, OS X, z/OS, VMS, OS/400, AIX, etc.
  Some important Functions of Operating System


  1. Processor Management   [ CLICK HERE FOR DETAIL ]
  2. Memory Management   [ CLICK HERE FOR DETAIL ]
  3. Disk Management   [ CLICK HERE FOR DETAIL ]
  4. File Management   [ CLICK HERE FOR DETAIL ]
  5. Input-Output Management   [ CLICK HERE FOR DETAIL ]
  6. Security & Protection   [ CLICK HERE FOR DETAIL ]
  7. Networking   [ CLICK HERE FOR DETAIL ]