• Signal is a short message sent from a process for enabling inter process communication
  • Signal is usually a one bit output comes from a process
  • signal takes a shortest possible CPU time unlike Semaphores.
  • Signals are useful for handling exceptions
  • Whenever there is an error during a running of process, a signal is generated thereby the scheduler schedules a process to handle that error, in this way signals are used extensively for error and exception handling


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