88. Identify two situations in which you can use Data Recovery Advisor for recovery. (Choose two.)
A.The database files are corrupted when the database is open.
B.The user has dropped an important table that needs to be recovered.
C.The archived redo log files are missing for which the backup is not available.
D.The database is not opening because the required database files are missing.
Answer: AD
答案解析：
参考：http://blog.csdn.net/rlhua/article/details/12622415
数据恢复指导可处理以下两种情况：一种是因必需的数据库文件缺失、不一致或损坏而无法启动数据库，另一种是在运行时发现文件损坏。