The document discusses the functions of an operating system. It explains that an operating system acts as an interface between the user and computer hardware, allowing users to interact with the computer through devices like a mouse and keyboard. It describes some key functions of an operating system, including managing the processor, memory, files, devices, security, and providing a user interface. The document also lists some common features of operating systems like processor management, memory storage and management, file management, and device management.

2. Computer being a machine cannot
do anything on its own . It requires
certain medium to get messages
from the user to the hardware . Thus
you need an interface to interact .
The interface is the operating system.

4. This operating system is graphic based
and interactive in nature .You can use
several devices such as mouse ,
keyboard etc. , to interact with the
system . Windows is the most popular
GUI in use nowadays .
GRAPHICAL USER
INTERFACE

5. HARDWARE : It refers
to the physical parts
of a computer that
you can see and touch
including the case and
everything inside it .
SOFTWARE : It is not
a physical part but it
can be stored in a
physical medium . Eg :
CD Rom ,a pendrive
and a hard disk.
HARDWARE AND SOFTWARE

6. SOFTWARE
System software Application software
*WE ARE GOING TO STUDY ONLY SYSTEM SOFTWARE

7. It is a collection of one or more
programs, that are designed to control
and manage the overall operation and
performance of a computer system . A
system software acts as an interface
between the user and the computer .
SYSTEM SOFTWARE

8. *to read data from the input devices .
*to transmit information from input to
output devices and vice versa.
*to check the working of all the internal and
peripheral devices .
*converting data and instructions into
binary form, that can be easily understood
by the computer .
FUNCTIONS OF SYSTEM
SOFTWARE

10. An operating system encompasses all operations , such
as :
What to do ? –to perform set of moves for the game
character .
When to do ? –when the required buttons are pressed in
correct sequence.
How to do ? -through proper communication with the
application software , and instructing about the correct
motion of the player as seen on the screen.
WORKING OF AN OPERATING
SYSTEM

11. 1.) Processor management
2.)Memory storage and management
3.) File management
4.) Device management
5.)Security and Protection
6.)Enforcement of priority system
7.)Provision of user interface
8.)Job control
FEATURES AND FUNCTIONS OF
OPERATING SYSTEM

12. It is one of the most important functions of an
operating system the OS ensures that each
process/application receives enough time from
the processor to function properly .it also tries to
utilize as many processor cycles as possible for
the real time work . It is these processes rather
than applications which are controlled managed
and executed by the operating system.
PROCESSOR MANAGEMENT

13. An operating system manages the sharing of internal memory among the
multiple applications . It also takes care of the fact that one process should
not consume the memory allocated to another process .An operating system
has to make efficient utilization of different types of memory within the
system ,so as to ensure proper execution of every process .
MEMORY STORAGE AND
MANAGEMENT

14. A computer system uses a lot of data , which is stored on the secondary
storage devices . The operating system keeps track of information regarding
creation ,deletion ,transfer ,copy
FILE MANAGEMENT