What are the basic functions of an operating system ?

Question

Can someone please explain following terms to help me understand ?
Throughput, Turn Around Time, Waiting Time and Response Time.

Answer 1

First Understand that what is an OS?
-> OS is a resource manager, which manages all the resources(Like : RAM,CPU)

Functions Of An OS is..
->Network Management
->Memory Management
->Process Management
->Synchronization
->Thread Management
->Signal Handling
->IPC (not sure about this)

Answer 2

The basic functions of an operating system are:

1.Booting the computer
2.Performs basic computer tasks eg managing the various peripheral devices eg mouse, keyboard
3.Provides a user interface, e.g. command line, graphical user interface (GUI)
4.Handles system resources such as computer's memory and sharing of the central processing unit (CPU) time by various applications or peripheral devices
5.Provides file management which refers to the way that the operating system manipulates, stores, retrieves and saves data.

Comments

I think first 2 point is not correct for OS...
That is been taken care by BIOS program...