多选题To enable faster incremental backups， you enabled block change tracking for the database. Which two statements are true about the block change tracking file？（）AMultiple change tracking files can be created for a database.BThe change tracking file must be created after the first level 0 backup.CRMAN does not support backup and recovery of the change tracking file.DThe database clears the change tracking file and starts tracking changes again，after whole database restore and recovery operations.
多选题
To enable faster incremental backups， you enabled block change tracking for the database. Which two statements are true about the block change tracking file？（）
A
Multiple change tracking files can be created for a database.
B
The change tracking file must be created after the first level 0 backup.
C
RMAN does not support backup and recovery of the change tracking file.
D
The database clears the change tracking file and starts tracking changes again，after whole database restore and recovery operations.
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单选题You enabled block change tracking for faster incremental backups in your database. Which background process writes to the change tracking file？（）A RBALB CKPTC SMOND PMONE MMONF CTWRG DBWR
单选题Which RMAN backup command is used to create the block-change tracking file？（）A alter database create block change tracking fileB alter database enable block change fileC alter database enable block change tracking using file ，/ora01/opt/ block_change_tracking.filD alter system enable block change tracking using file ’/ora01/opt/block_ change_tracking.fil’E alter system block change tracking on
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多选题To enable faster incremental backups, you enabled block change tracking for the database.Which two statements are true about the block change tracking file?（）AMultiple change tracking files can be created for a database.BThe change tracking file must be created after the first level 0 backup.CRMAN does not support backup and recovery of the change tracking file.DThe database clears the change tracking file and starts tracking changes again, after whole database restore and recovery operations.
多选题To enable faster incremental backups, you enabled block change tracking for the database.Which two statements are true about the block change tracking file? （）(Choose two.)AMultiple change tracking files can be created for a database.BThe change tracking file must be created after the first level 0 backup.CRMAN does not support backup and recovery of the change tracking file.DThe database clears the change tracking file and starts tracking changes again, after whole database restore and recovery operations.
多选题To enable faster incremental backups， you enabled block change tracking for the database. Which two statements are true about the block change tracking file？（）AMultiple change tracking files can be created for a database.BThe change tracking file must be created after the first level 0 backup.CRMAN does not support backup and recovery of the change tracking file.DThe database clears the change tracking file and starts tracking changes again，after whole database restore and recovery operations.
单选题You have not configured Oracle Managed Files （OMF） in your database. You do not want to scan the entire datafile every time an incremental backup is performed. You decide to enable the block change tracking feature. Which statement should you use to enable the block change tracking feature？（）A ALTER DATABASE ENABLE BLOCK CHANGE TRACKINGB ALTER SYSTEM ENABLE BLOCK CHANGE TRACKING USING FILE C ALTER DATABASE ENABLE BLOCK CHANGE TRACKING USING FILE D ALTER SYSTEM ENABLE BLOCK CHANGE TRACKING