单项选择题
A.to recover a dropped tablespace
B.to recover data from a truncated table
C.to recover a data file that has been shrunk
D.to recover a database to the state that existed before the RESETLOGS operation
单项选择题 View the Exhibit and examine the Flashback Database architecture. Identify the missing component （shown with a "？"） in the Flashback Database architecture.（）
多项选择题 You are working on an Oracle Database 10g database. Because of data loss， you decided to perform a Flashback Database operation using the following command： SQL> FLASHBACK DATABASE TO TIMESTAMP（SYSDATE 5/24） Which two statements are true？ （）
单项选择题 OnTuesday，ajuniorDBAdroppedanimportantapplicationuseraccount，whoseschemahasimportanttables.Youareaskedtorecoveralltheobjectsintheschema.Oninvestigation，youfindthattheuseraccountwasdroppedat11：00a.m.andSunday’sbackupisthemostrecentbackup.Whichflashbackfeaturewouldyouuse？（）