Discussion :: DBMS MCQs
- 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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A.
How long the transaction has computed, and how much longer the transaction will compute before it completes its designated task.
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B.
How many data items the transaction has used.
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C.
How many more data items the transaction needs for it to complete.
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D.
How many transactions will be involved in the rollback.
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E.
All of the mentioned
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Answer : Option E
Explanation :
All of the mentioned
We should roll back those transactions that will incur the minimum cost.
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