Consider the following frequent 3-sequences:
< {1, 2, 3} >, < {1, 2}{3} >, < {1}{2, 3} >, < {1, 2}{4} >,
< {1, 3}{4} >, < {1, 2, 4} >, < {2, 3}{3} >, < {2, 3}{4} >,
< {2}{3}{3} >, and < {2}{3}{4} >.
(a) List all the candidate 4-sequences produced by the candidate generation
step of the GSP algorithm.
(b) List all the candidate 4-sequences pruned during the candidate pruning
step of the GSP algorithm (assuming no timing constraints).
(c) List all the candidate 4-sequences pruned during the candidate pruning
step of the GSP algorithm (assuming maxgap = 1).
(a) < {1, 2, 3} {3} >, < {1, 2, 3} {4} >, < {1, 2} {3} {3} >, < {1, 2} {3} {4} >,
< {1} {2, 3} {3} >, < {1} {2, 3} {4} >.
(b) < {1, 2, 3} {3} >, < {1, 2} {3} {3} >, < {1, 2} {3} {4} >,
< {1} {2, 3} {3} >, < {1} {2, 3} {4} >.
(c) < {1, 2, 3} {3} >, < {1, 2} {3} {3} >, < {1, 2} {3} {4} >,
< {1} {2, 3} {3} >, < {1} {2, 3} {4} >.
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Your current backup schedule involves differential backups of all data Monday through Saturday, with a full backup on Sunday. Last Saturday, one of your storage drives failed prior to running the daily backup. What must be done to recover the data on the failed drive?
A. First the full backup from the previous Sunday must be restored, followed by each differential backup leading up to the day of the drive failure. B. The differential backup from Friday is restored, followed by the last full backup of the drive. C. The last full backup should be restored first, followed by the last successful differential backup prior to the drive failure. D. Only the differentials need to be restored, but they must be done in sequential order