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:AC
参考:
http://docs.oracle.com/cd/E11882_01/backup.112/e10642/rcmdupdb.htm#BRADV89928
一个复制副本是目标数据库的一个COPY,也可以是一个子集,在复制时跳过了只读表空间。
复制副本可以通过目标数据库的备份和归档日志文件来创建。
因复制副本缺少在线重做日志文件,必须通过RESETLOGS模式打开数据库。
复制副本与目标数据库有不同的数据库标识,即DBID是不相同的。
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