1. FUNCTIONS OF AN
OPERATING SYSTEM
ANEESH M.R

2. FUNCTIONS OF AN OPERTING SYSTEM
1.Device management :
In a multitasking operating system where
multiple programs can be running at the same time
,the operating system determines which application
should run
in what order and how much time
should be allowed for each application before giving
another applications

3. FUNCTIONS OF AN OPERTING SYSTEM
2.User interface:
It allows individuals to access and command
the computer system
Command based user interface: It requires that text
commands be given to the computer to perform
basic activities.

4. FUNCTIONS OF AN OPERTING SYSTEM
Graphical used interface(GUI): Uses icons and
menus displayed on screen to send commands to
the computer system.

5. FUNCTIONS OF AN OPERTING SYSTEM
3. Memory management:
The management of memory determines the
performance of computers. So it becomes the major
task to manage the memory in a better way. It allocates
the main memory and storage area for different job
such that memory can be utilized. It has two types of
allocation; one is single contiguous location and
second is partitioned allocation

6. FUNCTIONS OF AN OPERTING SYSTEM
4.Process management :
major job of the OS is to allow a processor to
the various jobs and processes manages that which
job will execute first. For this purpose it will uses a
job
scheduling
logarithms.
criteria
having
scheduling

7. FUNCTIONS OF AN OPERTING SYSTEM
5. File management or information management:
Whole of the data, programs and information be
stored in the secondary storage devices in the form of
file. It stored the different files on various devices and
transfer these files from one storage device to another.
It also manages all the files for creation, renaming,
copying,
reading,
operations.
appending
and
the
deletion

8. FUNCTIONS OF AN OPERTING SYSTEM
It is also used for the editing of the files. Backup of files
and folders can be taken with the help of an operating
system. It provides convenient procedures for storing
and accessing the information from files or directories.

9. FUNCTIONS OF AN OPERTING SYSTEM
6. Job Scheduling:
It establishes and enforces a job priority system by
setting
some
job
scheduling
criteria
and
job
management system. Scheduling is a fundamental
function of an operating system. Scheduling refers to a
set of policies and mechanism supported by the
operating system that controls the order in which, the
work to be done is completed.

10. FUNCTIONS OF AN OPERTING SYSTEM
7. Interpreter:
It also called command interpreter. As we know
that the computer can understand the machine
language like English, French etc..there be need of some
interpreter. It
interprets all the operating system’s
executable and system command and instructions in
according to the given format or according to the
defined syntax.

11. FUNCTIONS OF AN OPERTING SYSTEM
8. Security
In a multi user environment security is necessary,
because a file is shared by a number of users. The
security can be provided with the protection system of
an operating system. The facility of protection of files or
folders from unauthorized access can be provided with
the help of powerful operating system.

12. FUNCTIONS OF AN OPERTING SYSTEM
9. Secondary storage management
The major job of the computer system is data
processing. As the data processing uses data and
programs.
So there be need of storage space to store the data and
programs. For this purpose secondary storage devices
are
required i.e. need of secondary memory. This memory
can easily managed by the operating system.
.

13. FUNCTIONS OF AN OPERTING SYSTEM
So operating system keeps track of the space
available on the disk and allocate the space to the
data and the program on the secondary storage
disk or drum for the storage purpose

14. THANKS