WHAT IS OPERATING SYSTEM ?
•Operating
System is a software, which makes a computer to actually work.
•It
is the software that enables all the programs we use.
•The
OS organizes and controls the hardware.
•OS
acts as an interface between the application programs and the machine hardware.
•Examples: Windows, Linux, Unix and Mac OS, etc.
FUNCTIONS
of OPERATING SYSTEM
Memory Management
Process Management
Device Management
Information Management
Protection
Error Handling
Memory Management
The o/s keeps track of processors
and the status of processes. It decides who will have a chance to use the
processor.
Process Management
The
o/s keeps track of the devices,
channels, control units and decides what is an efficient way to allocate
the device.
Device Management
The
o/s keeps track of the devices,
channels, control units and decides what is an efficient way to allocate
the device.
Information Management
O/S keeps track of the
information, its location, use, status etc. and decides who
gets use of the resources, enforce protection requirements.
Protection
An
o/s is to protect the user from unauthorized access of his files or data. And
also it should protect itself from users.
Error Handling
An
o/s must respond to errors
by taking
the appropriate
actions.
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