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Consider a Simple Checkpointing Protocol and the following set of operations in the log. (start, T4); (write, T4, y, 2, 3); (start, T1); (commit, T4); (write, T1, z, 5, 7); (Checkpoint); (start, T2); (write, T2, x, 1, 9); (commit, T2); start, T3); (write, T3, z, 7, 2); if a crash happens now and the system tries to recover using both undo and redo operations, what are the contents of the undo list and the redo list?
Consider a simple checkpointing protocol and the following set of operations in the log. (start, T4); (write, T4, y, 2, 3); (start, T1); (commit, T4); (write, T1, z, 5, 7); (checkpoint); (start, T2); (write, T2, x, 1, 9); (commit, T2); (start, T3), (write, T3, z, 7, 2); If a crash happens now and the system tries to recover using both undo and redo operations, what are the contents of the undo list and the redo list?
Which shortcut key is used to undo changes (UNDO) in Ms-Word?
Which of the given options best describes the truthfulness of the following statements? (i) Ctrl + Y is used to perform "undo" operation in MS-Word. (ii) Ctrl + Z is used to perform "redo" operation in MS-Word. iii) Ctr l+ E  is used to Center the text
Two involute gears are designed to mesh for a given centre distance and a given angular velocity ratio (other than 1). During assembly, the centre distance has increased slightly. Then which of the following changes occur? (i) Velocity ratio changes (ii) Pressure angle changes (iii) Pitch circle diameter changes (iv) Working depth changes (v) Base circle radius changes Select the correct answer using the code given below.
Which of the given options best describes the truthfulness of the following statements? (i) Ctrl + Y is used to perform "undo" operation in MS-Word. (ii) Ctrl + Z is used to perform "redo" operation in MS-Word.
___________ determines which transactions to undo, which pages were dirty at the time of the crash, and the LSN from which the redo pass should start.
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.
For correct behaviour during recovery, undo and redo operation must be
The undo and redo operations must be _________ to guarantee correct behaviour, even if a failure occurs during recovery process.