What is a semaphore?(a) is a binary mutex(b) must be accessed from only one process(c) can be accessed from multiple processes(d) none of the mentionedI have been asked this question in a national level competition.My enquiry is from Semaphores topic in division Process Synchronization of Operating System

What is a semaphore?(a) is a binary mutex(b) must be accessed from onl

1.	What is a semaphore?(a) is a binary mutex(b) must be accessed from only one process(c) can be accessed from multiple processes(d) none of the mentionedI have been asked this question in a national level competition.My enquiry is from Semaphores topic in division Process Synchronization of Operating System
Answer» Right OPTION is (c) can be ACCESSED from MULTIPLE processes The best EXPLANATION: None.

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