1.

How many types of operating system ? name them ......

Answer» there are COMMONLY NINE types of operating system they are  :-
 - real time operating system 
  - multitasking operating system 
  - multiprocessing OS
  -  MULTI- access OS
  - time sharing OS
  -  multi programming OS
  - batch PROCESSING  operating system 
  - single user - multi tasking OS 
   - single user - single TASK OS

  


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