单项选择题
A. Datafile 4 will be recovered until 9/30/2008 at 15：00 and the database will open.
B. The restore command will fail.
C. The recover command will fail.
D. The alter database open resetlogs command will fail.
E. All these commands will fail because they must be in the confines of a run block.
单项选择题 IfyoufinderrorsintheviewV$DATABASE_BLOCK_CORRUPTIONwithastatusofMEDIA_CORRUPT，whatRMANcommandwouldyouruntocorrecttheproblem？（）
多项选择题 You have a database with the following tablespaces： SYSTEM， SYSAUX， UNDO， USERS， TEMP. You want to"roll back" the data in the USERS tablespace to the way it looked yesterday. Which tablespaces do you need to perform a point-in-time restore operation on in order to complete this task？（）
单项选择题 Whichofthefollowingdoestherecovercommandnotdo？（）