What are the methods of recovery from deadlock?

Please provide the method that are used to recover from a deadlock?
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"What are the methods of recovery from deadlock? Ans.: Recovery from Deadlock : When a Detection Algorithm determines that a Deadlock exists, several alternatives exist for recovery. One possibility is to inform the operator that a Deadlock has occurred, and to let the operator deal with the Deadlock manually. The other possibility is to let the System recover from the Deadlock automatically. There are two options for breaking a Deadlock. One solution is simply to abort one or more processes to break the circular wait. The second option is to preempt some resources from one or more of the Deadlocked processes. Source:"
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"· If a practice received one resourcefulness and also desires to acquire one more learning resource to get accomplished. However, that needed learning resource will be purchased by simply one more procedure. "
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