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单选题
A large corporation is concerned about the amount of time it takes to back up their main file server. They are also concerned that their IT technician frequently forgets to change the backup tapes, thereby leaving the company open to data loss. Which backup system would solve both problems?()
A

 RAID

B

 tape library

C

 optical storage

D

 disk to disk to tape


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考题 单选题Which statement is true about the loss of system-critical data files in ARCHIVELOG mode?()A The data files can be recovered till the last committed transaction.B The data files can be recovered without shutting down the database.C The data file is taken offline automatically; the database remains open.D The data files can be recovered to the time of the most recent backup.