Q. If only the primary is active, the transaction is allowed to commit as soon as its commit log record is written to stable storage at the primary site. This is

View solution

Q. Once the lower-level lock is released, the operation cannot be undone by using the old values of updated data items, and must instead be undone by executing a compensating operation; such an operation is called

View solution

Q. Which of the following is used for undo operations alone ?

View solution

Q. Redo operations are performed exclusively using

View solution

Q. To perform logical redo or undo, the database state on disk must be operation ___________ that is, it should not have partial effects of any operation.

View solution

Q. An operation is said to be __________ if executing it several times in a row gives the same result as executing it once.

View solution

Q. Immediate database modification technique uses

View solution

Q. Shadow paging has

View solution

Q. For correct behavior during recovery, undo and redo operation must be

View solution

Q. If ___________ are not obtained in undo operation it will cause problem in undo-phase.

View solution