Which of the followings is not an Operating System?

Unix
Linux
Java
Windows-11

The correct answer is (c). Java is a programming language, not an operating system. Unix, Linux, and Windows-11 are all operating systems.

An operating system is a software program that manages a computer’s hardware and software resources and provides a platform for running other programs. It is the most important program on a computer, and without it, no other programs can run.

Unix is a multitasking, multiuser computer operating system that exists in many variants. The original Unix was developed at AT&T’s Bell Labs research center by Ken Thompson, Dennis Ritchie, and others. Unix was first released in 1971, and it has been widely used in academia, business, and government ever since.

Linux is a Unix-like operating system that was developed by Linus Torvalds in 1991. Linux is free and open-source software, which means that it is available to anyone to use, modify, and redistribute. Linux is used on a wide variety of devices, including servers, personal computers, smartphones, and tablets.

Windows-11 is the latest version of Microsoft’s Windows operating system. It was released in October 2021. Windows-11 is a graphical user interface (GUI) operating system that is designed to be easy to use. It includes a number of new features, such as a redesigned Start menu, a new taskbar, and support for Android apps.

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