Name one example of a popular operating system.

• A. Java
• B. Photoshop
• C. Windows, macOS, Linux
• D. Excel

Answer: (C)

The correct choice identifies a well-known example of operating systems, which serve as the fundamental software layer managing hardware resources and providing services for application programs. Windows, macOS, and Linux are all recognized operating systems that users interact with to perform tasks on computers and other devices.

Windows is widely used in personal computing environments, macOS is known for its use on Apple's computers, and Linux is notable for its open-source nature and versatility across a variety of systems including servers. Each of these operating systems provides a user interface, manages files, and facilitates the execution of applications. This clear distinction sets them apart from other choices that are software applications rather than operating systems, such as Java, Photoshop, and Excel, which serve different functions within the computing ecosystem.