Which two statements are true regarding the database in ARCHIVELOG mode? (Choose two.) A) You have to shut down the database to perform the backups. B) Archiving information is written to the data files and redo log files. C) You can perform complete database backups without closing the database. D) Online redo log files have to be multiplexed before putting the database in ARCHIVELOG mode. E) All the previous database backups become invalid after you configure the database to ARCHIVELOG mode. Answer: C,E 数据库在归档模式下,可以联机进行备份。归档日志信息不会往数据文件和日志文件中写。不一定要多元化日志文件才能开启归档,但建议这么做。
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