Question

what is operating system ?what is its role

Answer 1

An operating system (OS) is system software that manages computer hardware and software resources and provides common services for computer programs. All computer programs, excluding firmware, require an operating system to function.
Role:-An operating system has three main functions:
(1) manage the computer's resources, such as the central processing unit, memory, disk drives, and printers,
(2) establish a user interface, and
(3) execute and provide services for applications software.

Answer 2

An operating system is software that communicates with the hardware and allows other programs to run. It is consists of system software, or the fundamental files our computer needs to run and function.
role of operating system is to provides basic functionality to the device. so the type of oprating system we choose will affect the functioning of the system.
hope this will help