单项选择题

花药绒毡层细胞来自（） A.
表皮细胞 B.
初生壁细胞 C.
造孢细胞 D.
中层细胞

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单项选择题
You are using recovery Manager (RMAN) with a recovery catalog to backup up your production databasE.The backups and the archived redo log files are copied to a tape drive on a daily basis. The database was open and transactions were recorded in the redo logs. Because of fire in the building you lost your servers having the production database and the recovery catalog databasE.The archive log files generated after the last backup are intact on one of the remote locations. While performing a disaster recovery of the production database what is the next step that you must perform after restoring the data files and applying archived redo logs?（）A.Open the database in NORMAL modeB.Open the database in read-only modeC.Open the database in RESTRICTED modeD.Open the database with the RESETLOGS option
A.The
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Examine the following scenario:-Database is running in ARCHIVELOG modE.-Complete consistent backup is taken every Sunday.-On Tuesday the instance terminates abnormally because the disk on which control files are located gets corrupted-The disk having active online redo log files is also corrupteD.-The hardware is repaired and the paths for online redo log files and control files are still valiD.Which option would you use to perform the recovery of database till the point of failure?（）A.Restore the latest whole backup, perform complete recovery, and open the database normallyB.Restore the latest whole backup, perform incomplete recovery, and open the database with the RESETLOGS optionC.Restore the latest backups control file, perform complete recovery, and open the database with the RESETLOGS optionD.Restore the latest backup control file, perform incomplete recovery using backup control file, and open the database with the RESETLOG option
A.-Complete
B.-On
C.-The
D.Which
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