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If database modifications occur while the transaction is still active, the transaction is said to use the ___________technique.(a) Deferred-modification(b) Late-modification(c) Immediate-modification(d) UndoI have been asked this question in final exam.I'm obligated to ask this question of Recovery in chapter Recovery System of Database Management

Answer»

The correct answer is (c) Immediate-modification

Best EXPLANATION: We say a transaction MODIFIES the DATABASE if it performs an update on a disk buffer, or on the disk itself; UPDATES to the private part of main MEMORY do not count as database modifications.



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