单项选择题
A. Restore archived redo logs.
B. Apply archived redo logs.
C. Restore incremental backups.
D. Apply incremental backups.
E. Restore datafile images.
多项选择题 Whichofthefollowingarevaliduntilcommandoptionswhenattemptingpoint-in-timerecoveryinRMAN？（）
单项选择题 What happens if you shutdown abort ASM instance?（）
单项选择题 While tuning a SQL statement, the SQL Tuning Advisor finds an existing SQL profile for the statement that has stale statistics available. What would the optimizer do in this situation?（）