What is an operating system and why do devices need it?

Question

Every computer and smartphone runs on an operating system such as Windows, Android, iOS or Linux. But what exactly does an OS do, and why is it necessary?

Answer 1

An Operating System (OS) is the main software that manages all hardware and software on a device. It acts as a bridge between the user and the computer hardware. Without an OS, you would not be able to open applications, browse the Internet, or interact with files. The OS controls memory, processes, storage, device drivers and security.

Examples include Windows for PCs, Android for smartphones and Linux for servers.

Answer 2

The OS provides key features like file management, user interface, system updates and security controls. It also manages multitasking by allowing several applications to run at the same time. For Technology Basics GK, remember: OS = system software + manages hardware + runs apps + ensures security.