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WHY DO WE NEED AN OPERATING SYSTEM?
Without an operating system, a computer cannot function, and users will not be able to run
programs because the operating system controls and coordinates the activities of both software
and hardware. The operating system acts as an interface between the computer and the user,
facilitating communication in both directions. It ensures that tasks are performed effectively and
without unnecessary delay by managing interactions between the various components of the
computer.
FUNCTIONS OF AN OPERATING SYSTEM
As we turn on the computer, the operating system
begins its work. After booting, the operating system
is loaded into the computer's memory. Once it is
successfully loaded, the operating system takes
control and manages all the functions of the
computer.
An operating system performs various functions.
Some of them are:
Arranging Files and Folders: An operating
Functioning of Operating System
system helps organise the files and folders
stored on the hard disk. It also keeps track of information about when a file is created,
copied, and modified.
Assigning Tasks to the CPU: An operating Clickipedia
system assigns tasks to the CPU based on
user instructions. It manages the execution The process of loading an operating system
of these tasks and allocates the necessary is called booting of the system.
resources to complete them.
Managing Memory: An operating system manages memory space for multiple processes. It
keeps track of every memory location, whether allocated to a process or free. It also allocates
memory to files and folder deallocates it when files or folders are deleted.
Managing Resources: An operating system monitors the hardware and software requirements
of processes. It acts as a manager for these resources, allocating them to different programs
as needed.
Managing Devices: An operating system controls all input and output devices connected to
the computer. It processes instructions from input devices and produces results on output
devices.
Security: An operating system includes built-in security features to protect programs and
data against unauthorised access.
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