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Q: Which of the following is NOT an operating system?
  • A. Unix
  • B. Ubuntu
  • C. MS-DOS
  • D. MS-Excel
Correct Answer: Option D - The operating system is a system software that organizes the hardware resources of a computer system, such as memory, processor and input-output devices. The operating system acts as a bridge between hardware and software. Examples of operating system are- UNIX, Ubuntu, MS DOS, Windows-10, LINUX IBM OASH/2 Android, IOS, Symbian etc. Whereas, MS-Excel in a spread sheet developed by Microsoft which is used to save & analyse numerical data.
D. The operating system is a system software that organizes the hardware resources of a computer system, such as memory, processor and input-output devices. The operating system acts as a bridge between hardware and software. Examples of operating system are- UNIX, Ubuntu, MS DOS, Windows-10, LINUX IBM OASH/2 Android, IOS, Symbian etc. Whereas, MS-Excel in a spread sheet developed by Microsoft which is used to save & analyse numerical data.

Explanations:

The operating system is a system software that organizes the hardware resources of a computer system, such as memory, processor and input-output devices. The operating system acts as a bridge between hardware and software. Examples of operating system are- UNIX, Ubuntu, MS DOS, Windows-10, LINUX IBM OASH/2 Android, IOS, Symbian etc. Whereas, MS-Excel in a spread sheet developed by Microsoft which is used to save & analyse numerical data.