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Operating System
Atomic Transactions
Q
Consider a transaction T1 that committed prior to checkpoint. The record appears in the log before the record. Any modifications made by T1 must have been written to the stable storage either with the checkpoint or prior to it. Thus at recovery time ____________
AA. There is a need to perform an undo operation on t1
BB. There is a need to perform a redo operation on t1
CC. There is no need to perform an undo and redo operation on t1
DD. All of the mentioned
Correct Answer:
C. C. There is no need to perform an undo and redo operation on t1
