DOS is an example of:a) Real Time Processing OS b) Multi Processing OSc) Single User OS d) Multi User OS

DOS is an example of c) Single User OS.

Step 1: Understand the question - The question is asking which type of operating system (OS) the Disk Operating System (DOS) is an example of.

Step 2: Know what DOS is - DOS, or Disk Operating System, is a computer operating system that provides a file system for operations such as file creation, deletion, and access.

Step 3: Know the types of operating systems - The options given are Real Time Processing OS, Multi Processing OS, Single User OS, and Multi User OS.

Step 4: Match DOS to the correct type - DOS is a Single User OS. This means it is designed to manage the computer so that one user can effectively do one thing at a time.