How are the wait/signal operations for monitor different from those for semaphores?
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Answer / Satvir Singh
In Java, the wait() and notify() methods are used for synchronization in a Monitor (a concurrency control mechanism). They're associated with an object's intrinsic lock. On the other hand, semaphores use wait() and signal() to block a thread when the resource it needs is unavailable, and to resume the thread once the resource becomes available. While both are used for synchronization, they operate at different levels and have slightly different functionality.
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