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OPERATING SYSTEMDefine deadlock. List four necessary conditions for occurrence of deadlock.20197mOperating SystemWhich technique allows the operating system to examine the resource allocation state dynamically to ensure no deadlock occurs? (i) Deadlock detection (ii) Deadlock recovery (iii) Deadlock avoidance (iv) Deadlock ignoring20252mOPERATING SYSTEMCompare and contrast Deadlock Prevention and Deadlock Avoidance. Can a system be in a state that is neither deadlock nor safe? If so, give an example. If not, prove that all states are either deadlock or safe.202414mOperating SystemWrite necessary conditions that must hold simultaneously to arise deadlock situation. Briefly explain different deadlock handling mechanisms.20227m