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， acumulativeincremental level 1 tape backup is performed. Which two statemen
题目
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， acumulativeincremental level 1 tape backup is performed. Which two statements 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 incremental backup at level 1.