单选题Your database is configured in NOARCHIVELOG mode. Due to a media failure， you have lost one of the datafiles belonging to a read-only tablespace. You know that the last backup was performed after the tablespace was made read-only. Which action should you take to restore the missing datafile in the minimum amount of time？（）A Restore all the datafiles from the backup.B Restore only the lost datafile from the backup.C Restore all the datafiles for the lost tablespace from the backup.D Restore all the datafiles for the lost tablespace and all the SYSTEM and SYSAUX datafiles from the backup.
单选题
Your database is configured in NOARCHIVELOG mode. Due to a media failure， you have lost one of the datafiles belonging to a read-only tablespace. You know that the last backup was performed after the tablespace was made read-only. Which action should you take to restore the missing datafile in the minimum amount of time？（）
A
Restore all the datafiles from the backup.
B
Restore only the lost datafile from the backup.
C
Restore all the datafiles for the lost tablespace from the backup.
D
Restore all the datafiles for the lost tablespace and all the SYSTEM and SYSAUX datafiles from the backup.
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单选题In your database， online redo log files are multiplexed and one of the members in a group is lost due to media failure. How would you recover the lost redo log member？（）Aimport the database from the last exportBrestore all the members in the group from the last backupCdrop the lost member from the database， and then add a new member to the groupDrestore all the database files from the backup， and then perform a complete recovery Erestore all the database files from the backup， and then perform an incomplete recovery
多选题Your database is configured in NOARCHIVELOG mode. All the control files have been lost due to a hard disk failure but the data files are not lost. You have the closed whole database backup available to you. Which two statements are true in this scenario？（）AThe instance aborts.BThe database cannot be recovered.CThe database can be recovered by restoring the control files from the backup.DThe database remains opened and you have to shut it down with the ABORT option.EThe database can be restored till the point of the last closed whole database backup.
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