605.What two are the prerequisites for enabling Flashback Database? (Choose two)
A. The database must be in ARCHIVELOG mode
B. The database must be in MOUNT EXCLUSIVE mode
C. The database must be opened in RESTRICTED mode
D. The database instance must be started in the NOMOUNT state
E. The database instance must have the keep buffer pool defined
Answer: AB
启用闪回数据库的先决条件：
1、闪回数据库要求归档日志模式；
2、闪回数据库需要以独占模式装载数据库。
A. The database must be in ARCHIVELOG mode
B. The database must be in MOUNT EXCLUSIVE mode
C. The database must be opened in RESTRICTED mode
D. The database instance must be started in the NOMOUNT state
E. The database instance must have the keep buffer pool defined
Answer: AB
启用闪回数据库的先决条件：
1、闪回数据库要求归档日志模式；
2、闪回数据库需要以独占模式装载数据库。
来自 “ ITPUB博客 ” ，链接：https://blog.itpub.net/81227/viewspace-2107988/ ，如需转载，请注明出处，否则将追究法律责任。
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