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A deadlock exists in the system if and only if the wait-for graph contains a ___________

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A deadlock exists in the system if and only if the wait-for graph contains a ___________ (a) Cycle (b) Direction (c) Bi-direction (d) Rotation I have been asked this question in a job interview. The above asked question is from Deadlocks in section Concurrency Control of Database Management Select the correct answer from above options Interview Questions and Answers, Database Interview Questions and Answers for Freshers and Experience

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Right answer is (a) Cycle Best explanation: Each transaction involved in the cycle is said to be deadlocked.

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