Five recovery techniques are listed below. For each situation described, decide which of the following recovery techniques is most appropriate.
? Backward recovery
? Forward recovery (from latest checkpoint)
? Forward recovery (using backup copy of database)
? Reprocessing transactions
a. A phone disconnection occurs while a user is entering a transaction.
b. A disk drive fails during regular operations.
c. A lightning storm causes a power failure.
d. An incorrect amount is entered and posted for a student tuition payment. The error is not discovered for several weeks.
e. Data entry clerks have entered transactions for two hours after a full database backup when the database becomes corrupted. It is discovered that the journalizing facility of the database has not been activated since the backup was made.
This question was answered on: Jul 11, 2017
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