多选题You are managing an Oracle Database 11g database with the following backup strategy：1） On Sunday， an incremental level 0 tape backup is performed.2） Monday through Saturday， a cumulative incremental level 1 tape backup is performed. Which twostatements are true regarding the backups performed（）AThe backup performed in step 1 backs up all blocks that have ever been in use in the database.BThe backup performed in step 2 copies all the blocks changed since the most recent level 0 backup.CThe backup performed in step 1 backs up all the blocks changed since the most recent level 1 backup.DThe backup performed in step 2 backs up all blocks that have changed since the most recent incrementalbackup at level 1
多选题
You are managing an Oracle Database 11g database with the following backup strategy：1） On Sunday， an incremental level 0 tape backup is performed.2） Monday through Saturday， a cumulative incremental level 1 tape backup is performed. Which twostatements are true regarding the backups performed（）
A
The backup performed in step 1 backs up all blocks that have ever been in use in the database.
B
The backup performed in step 2 copies all the blocks changed since the most recent level 0 backup.
C
The backup performed in step 1 backs up all the blocks changed since the most recent level 1 backup.
D
The backup performed in step 2 backs up all blocks that have changed since the most recent incrementalbackup at level 1
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