When youre performing a tablespace point-in-time recovery, which tablespaces will always be
restored to the auxiliary instance? (Choose all that apply.)
A. The SYSTEM tablespace.
B. The UNDO tablespace.
C. All tablespaces with tables.
D. All tablespaces with indexes.
E. No tablespaces are automatically restored.
The SYSTEM and UNDO tablespaces will always be restored during a tablespace point-in-time
recovery operation.
原文：http://www.cnblogs.com/Babylon/p/7794446.html