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Selecting the victim to be rollbacked to the previous state is determined by the minimum cost. The factors determining cost of rollback is

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Selecting the victim to be rollbacked to the previous state is determined by the minimum cost. The factors determining cost of rollback is (a) How long the transaction has computed, and how much longer the transaction will compute before it completes its designated task (b) How many data items the transaction has used (c) How many more data items the transaction needs for it to complete (d) All of the mentioned I got this question by my school teacher while I was bunking the class. I would like to ask this question from Deadlocks topic in portion 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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The correct choice is (d) All of the mentioned For explanation: We should roll back those transactions that will incur the minimum cost.

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