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Which of the following operating systems guarantees a response within specified time constraints?
1. Distributed operating system
2. Real-time operating system
3. Time sharing operating system
4. Interactive operating system

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Correct Answer - Option 2 : Real-time operating system

The correct answer is a Real-time Operating system.

  •  Real-time operating system
    • Real-time operating systems are used in environments where a large number of events, mostly external to the computer system, must be accepted and processed in a short time within certain deadlines.
    • The processing in this type of system must occur within the specified constraints.
    • Examples of the real-time operating systems: Airline traffic control systems, Command Control Systems, Airlines reservation system, Heart Peacemaker, Network Multimedia Systems, Robot, etc.

  •  Distributed operating system
    • A distributed operating system is an essential type of operating system. 
    • They use many central processors to serve multiple real-time applications and users.
    • It connects multiple computers via a single communication channel.
    • They are also known as loosely coupled systems.
  • Time-sharing operating system
    • A time-sharing operating system allows multiple users to share computers simultaneously.
    • A time-sharing operating system uses CPU scheduling and multi-programming to provide each with a small portion of a shared computer at once.
    • Examples of time Sharing are Multics, Unix.
  • ​​Interactive operating system
    • An interactive operating system is one that allows the user to directly interact with the operating system whilst one or more programs are running.
    • Both the UNIX operating system and DOS (Disk Operating System) are classic examples.

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