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Module 3: Inter-process Communication

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What is Semaphore? Explain with algorithm the Dining-Philosophers Solution using Monitors.

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Semaphore

Integer sync variable. Dining Philosophers with Monitor: monitor with 5 condition vars, state[] = thinking/hungry/eating, test(i) checks neighbors not eating, pickup puts hungry then test, putdown sets thinking then tests neighbors. Monitor ensures mutex, prevents deadlock/starvation vs semaphore solution with deadlock risk.

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