a) P11
b) OS/2
c) Windows
d) Unix
Answer: a
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Consider a transaction T1 that committed prior to checkpoint. The <T1 commits> record appears in the log before the <checkpoint> 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 ____________
The system periodically performs checkpoints that consists of the following operation(s) ____________
The undo and redo operations must be _________ to guarantee correct behaviour, even if a failure occurs during recovery process.
An actual update is not allowed to a data item ____________
In the write ahead logging a _____________ is maintained.
Write ahead logging is a way ____________
The state of the data accessed by an aborted transaction must be restored to what it was just before the transaction started executing. This restoration is known as ________ of transaction.
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