单项选择题 You discover that a disk failure occurred on DISK3 where the data file belonging to the USER_DATA tablespace is stored. The database is currently open and you need to recover the data file. You will restore the data file from the backup on DISK5 to DISK2.  What is the correct sequence of commands to restore and recover the data file？（）

单项选择题 WhenperformingrecoverofadatabaseinNOARCHIVELOGmodewithRMAN，thetargetdatabasemustbeinthe（）statetorestorethecontrolfile.

单项选择题 Click the Exhibit button and examine the diagram.  You are running a database that takes advantage of features provided by Connection Manager， heterogeneous services， and external procedures. The diagram depicts the components used for the naming method you just configured. Which naming method are you using？（）