Which one of the following is an open source time-sharing operating system?

Correct option is C

Linux is an open-source operating system that supports time-sharing, which allows multiple users or processes to share system resources efficiently. Its source code is freely available, and it has been widely adopted in servers, desktops, and embedded systems.

Important Key Points:

• Time-sharing allows multiple tasks to run seemingly at the same time by rapidly switching between them.

• Linux is based on the UNIX design philosophy but is distributed under the GNU General Public License (GPL).

• It supports multitasking, multiuser operations, and robust security features.

Knowledge Booster:

• MS-DOS is a single-user, single-tasking operating system—not time-sharing.

• Windows is not open-source; it is a proprietary OS developed by Microsoft.

• UNIX is time-sharing but generally not open-source (though some variants are).