Which of the following is a single user operating system?

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SSC CHSL 2020 Official Paper 20 ( Held on: 5 Aug 2021 Shift 2)
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  1. Linux
  2. Windows 7
  3. MS-DOS
  4. Windows NT

Answer (Detailed Solution Below)

Option 3 : MS-DOS
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Detailed Solution

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The correct answer is MS-DOS.

Key Points

  • An operating system that allows a single user to perform only one task at a time is called a Single-User Single-Tasking Operating System.
  • Functions like printing a document, downloading images, etc., can be performed only one at a time. Examples include MS-DOS, Palm OS, etc.
  • Advantage:
    • This operating system occupies less space in memory.
  • Disadvantage:
    • It can perform only a single task at a time.

Additional Information

  • There are four types of operating systems -
    • Real-time operating system.
    • Single-User/Single-Tasking operating system.
    • Single-User/Multitasking operating system.
    • Multi-User/Multitasking operating system.
  • A real-time operating system is designed to run real-time applications. It can be both single- and multi-tasking. Examples include Abbasi, AMX RTOS, etc.
  • An operating system that allows a single user to perform more than one task at a time is called Single-User Multitasking Operating System.
  • Examples include Microsoft Windows and Macintosh OS.
  • It is an operating system that permits several users to utilize the programs that are concurrently running on a single network server. The single network server is termed as "Terminal server". "Terminal client" is software that supports user sessions. Examples include UNIX, MVS, etc.
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