Which of the following statements is true regarding the initialization parameter DIAGNOSTIC_DEST？（）  
The default value is the value of the environment variable $ORACLE_HOME； if $ORACLE_HOME isn’t set  

多项选择题WhichofthefollowinginitializationparametershavebeendeprecatedinOracle11gbecauseoftheintroductionoftheAutomaticWorkloadRepository？（）

A. BACKGROUND_DUMP_DEST
B. FOREGROUND_DUMP_DEST
C. CORE_DUMP_DEST
D. USER_DUMP_DEST
E. DIAGNOSTIC_DEST
F. All of the above

单项选择题TocleanupoldrecordsthatareinaFlashbackDataArchiveandarepasttheretentionperiod，whatmusttheDBAdo？（）

A. TRUNCATE the archive table.
B. DROP the Flashback Data Archive.
C. Nothing；expired rows are automatically removed.
D. Nothing；expired rows are moved to an archive table.
E. Delete entries from the archive where the metadata date retained is greater than the retention period.

多项选择题WhensettinguptheFlashbackDataArchive，whichofthesekeyparametersarerequired？（）

A. Tablespace name
B. Storage quota
C. Retention
D. Table name
E. Create a default archive

多项选择题WhichofthesearevalidFlashbackDatabaserecoverypointparameters？（）

A. SCN
B. Timestamp
C. Named recovery point
D. Transaction ID
E. Session ID

单项选择题The（）writestheFlashbackDatabaselogsintheflashrecoveryarea.

A. FLSH
B. FLDB
C. RVWR
D. RVRW
E. FBDA