多项选择题

You have enabled backup optimization for the RMAN environment. Identify two criteria on which RMAN will skip the file， if it has already been backed up.（）

A. The data file backup is done with multiple channels
B. The data files is in the read-write mode after being backed up in the read only mode
C. The backup was taken after the data files was taken offline-normal or is in the read only mode
D. The data file backup complies with the back retention policy and the backup duplexing fe ture

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单项选择题You want to set the following initialization parameters for your database instance： LOG_ARCHIVE_DEST_1 = ’LOCATION= disk1 arch’ LOG_ARCHIVE_DEST_2 = ’LOCATION= disk2 arch’ LOG_ARCHIVE_DEST_3 = ’LOACTION= disk3 arch’ LOG_ARCHIVE_DEST_4 = ’LOCATION= disk4 arch MANDATORY’ Identify the statement that correctly describes this setting.（）

A. The MANDATORY location must be a flash recovery area.
B. The optional destinations may not use the flash recovery area.
C. This setting is not allowed because the first destination is not set as MANDATORY.
D. The online redo log file is not allowed to be overwritten if the archived log cannot be created in the fourth destination.

单项选择题Before a Flashback Table operation，you execute the following command： ALTER TABLE employees ENABLE ROW MOVEMENT； Why would you need this to be executed？（）

A. Because row IDs may change during the flashback operation
B. Because the object number changes after the flashback operation
C. Because the rows are retrieved from the recycle bin during the flashback operation
D. Because the table is moved forward and back to a temporary during the flashback opertion

多项选择题Whichthreetypesoffilescanbeautomaticallyplacedintheflashrecoveryareafastrecoveryareain11gRelease2？（）

A. Alert log file
B. Archived redo log files
C. Control file autobackups
D. Server Parameter file （SPFILE）
E. Recovery Manager （RMAN） backup piece

单项选择题Youwanttousetheautomaticmanagementofbackupandrecoveryoperationsfeaturesforyourdatabase.Whichconfigurationmustyouset？（）

A. Enable the flash recovery area and specify it as the archived redo log destination.
B. Disable the flash recovery area and start the database instance in ARCHIVELOG mode.
C. Enable the flash recovery area but do not specify it as the archived redo log destination.
D. Disable the flash recovery area and start the database instance in NOARCHIVELOG mode.

多项选择题Examine the following command used to perform incremental level 0 backup： RMAN> BACKUP INCREMENTAL LEVEL 0 DATABASE； To enable the block change tracking， after the incremental level 0 backup you issued the following command： SQL> ALTER DATABASE ENABLE BLOCK CHANGE TRACKING USING FILE ’ mydir rman_change_track.f’；To perform incremental level 1 cumulative backup， you issued the following command： RMAN> BACKUP INCREMENTAL LEVEL 1 CUMULATIVE DATABASE； Which two statements are true in the above situation？（）

A. The block change tracking data will be used only from the next incremental 0 backup.
B. The incremental backup will use change tracking data for accomplishing the backup.
C. The incremental backup will not use change tracking data for accomplishing the backup.
D. The block track file will scan all the blocks and create bitmap for all the blocks backed up in the level 0 backup.