Give an example of an unsafe state and show how all of the processes could complete without a deadlock occurring.
What will be an ideal response?
Consider the system state shown in Section 7.8.2, Example of an Unsafe State. The state is unsafe because only one resource unit is available and a minimum of two resource units would be needed to eventually allow all users to finish. Suppose P1 temporarily releases one resource unit. That makes two available. That enables P3 to finish and return three resource units. Then either P1 or P2 may finish, and eventually the other may finish.
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