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Give an example of a deadlock in a system with a few processes and a single...

Give an example of a deadlock in a system with a few processes and a single resource class. Show a situation that leads to deadlock in such a system.

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Answer #1

For example - thread 1 is running and locks M1, but before it can lock M2, it is interrupted. Thread 2 starts running; it locks M2, when it tries to obtain and lock M1, it is blocked because M1 is already locked (by thread 1). Eventually thread 1 starts running again, and it tries to obtain and lock M2, but it is blocked because M2 is already locked by thread 2. Both threads are blocked; each is waiting for an event which will never occur.

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