052-120

For which database operation would you need the database to be in the MOUNT state?
A.renaming the control files
B.re-creating the control files
C.dropping a user in your database
D.dropping a tablespace in your database
E.configuring the database instance to operate in the ARCHIVELOG or NOARCHIVELOG modes

ACD 需要在数据库处于 open 状态
B 需要数据库处于 nomount 状态
数据库在 mount 期间可以执行以下操作:
 启用或禁用 redo 日志归档选项
 执行完整的数据库恢复