Discussion
Deadlock requires that four conditions hold together. They are mutual exclusion, hold and wait, no preemption and
Answer: C
Correct answer: circular wait
Coffman’s four conditions must hold together: mutual exclusion, hold and wait, no preemption, and a circular chain of tasks each waiting for a resource the next holds. Breaking any one prevents deadlock, and imposing a global lock ordering is the usual way of breaking the fourth.
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