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Answer Posted / dibya jyoti(titanmtp)
Semaphore is a technique in which we can avoid the mutual
exclusion problem.or in other words we say it as the
protected variable(ie.They are used for process sync and
are used to resolve deadlock conditions.)
That means if there are many proceess sharing
a same resources then other process must wait it until the
process in critical section is completed as the process in
critical section is completed its send a signal to the
other process to enter a critical section.
basically it is done in two types
1*General semaphore or (counting semaphore)
2*Binary semaphore or (Mutex)
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