1Z0-053 争议题目解析700
考试科目：1Z0-053
题库版本：V13.02
题库中原题为：
700.Which two statements are true about a duplicate database that is created by using the DUPLICATE
command in RMAN? (Choose two.)
A.It is a copy or a subset of the target database.
B.It is opened in RESTRICT mode after a duplicating operation.
C.It is created by using backups and archived redo log files from the target database.
D.It is created with the same database identifier (DBID) as that of target database.
Answer:CD
争议点：
网上有人说选择AC，比如“标记为正确答案，不看answer版”题库。
比如：
比如Riveore的解析：http://blog.csdn.net/rlhua/article/details/17608239
比如：
LuiseDalian的解析：http://blog.itpub.net/17013648/viewspace-1348143/
D显然错，duplicate的数据库DBID和原数据库不一样。
初步结论：
选择AC。