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 that manages computer hardware and software resources and provides a platform for running application programs. It acts as an interface between a user and the computer hardware, and it provides a number of services to programs, such as file management, memory management, and input/output.
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 since then.
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 can be used and modified by anyone. Linux is used on a wide variety of devices, including servers, personal computers, and mobile phones.
Windows-11 is the latest version of Microsoft’s Windows operating system. It was released in October 2021. Windows-11 is a graphical operating system that supports a variety of applications, including word processors, spreadsheets, and games.