OPerating System
Is software program that controls the
Internal activities of the computer hardware and provides user interface.
OS is the first program
Loaded into the Computer's main memory
After the computer is switch on.
An operating system performs the following functions.
a. Processor Management : It assigns processors to the different tasks that must
Be performed by the computer system.
b. Memory Management : It allocates the main memory to the system programs, user programs and data.
C. Input/output Management : It carries
Out the input /output management.
d. Scheduling : It determines and maintains the order in which jobs are to
be executed in the computer system.
e. Time sharing : It coordinates the assign
Compilers, assemblers, utility program and
Other software packages.
f. File Management : It manages files on
Various storage devices and the transfer
Of these files from one storage device to another.
In short, the main functions of operating system are:
a. Resource Management ( processor, memory and device management).
b. Process ManagementManagement (Task and Job Scheduling).
C. Security Management.
* Operating system that supports a single
User is called single-user operating system. (Window xp). Linux , unix etc support multiple users at a time.
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