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Which scheduling policy is most suitable for Real time operating systems?

  1. FCFS
  2. LCFS
  3. Round Robin
  4. Priority
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In real time OS they are of two types 

1) Soft real time OS example BDS

2) hard real time OS example rocket launching used by ISRO NASA ..A hard real-time system (also known as an immediate real-time system) is hardware or software that must operate within the confines of a stringent deadline.  

Priority matters here instead of round robin FCFS OR LJF OR SJF

So answer should be priority.

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