Choose two.
Which two are true about backup set compression using RMAN default compression?

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Choose two.
Which two are true about backup set compression using RMAN default compression?

A.Compressed backups cannot have a section size defined.
B.Compressed backups can be written only to media.
C.Binary compression adds CPU overhead to backup operations.
D.Unused blocks below the high water mark are backed up.
E.Compression can be done only for locally managed tablespaces.
正确答案CE
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