In which two cases would you use an outer join? （）

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  A .  You find that one of the redo log members in each redo log group is lost. B .  You find that a data file that belongs to the USERS tablespace is damaged. C .  You find that a data file that belongs to the SYSTEM tablespace is damaged. D .  You find that the current redo log group is damaged and is not available for recovery. E .  You realized while performing a recovery that an archived redo log file needed for recovery is lost.

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• You configured the flash recovery area in the database. Which two files would you expect to find in the flash recovery area？ （）

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• Which of the following NLS_SORT parameter values would result in case-insensitive and accent-insensitive binary sorts?（）

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• In the parameter file of the production database， the BACKGROUND_DUMP_DEST parameter is set to $ORACLE_HOME/users. Which two types of files would you find in this location？（）

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