Which statement is true about a database in ARCHIVELOG mode?
A) Full database backups can be performed when the database is opened.
B) A Fast Recovery Area (FRA) must be configured for the database.
C) Online redo log files have to be multiplexed before putting the database in ARCHIVELOG mode.
D) All backups taken prior to switching to ARCHIVELOG mode can be used to perform complete recovery.
Answer：A
(解析：归档模式下可以进行热备，归档之前的备份是不能用来做完全恢复，因为缺少归档日志 来自3组：1015267481)