单项选择题 In this scenario， assume that you archive logs 101 to 104 to two archiving destinations， /log1 and /log2. The control file contains archived log records as follows：   Sequence Filename  101 /log1/log_1_101.arc  101 /log2/log_1_101.arc  102 /log1/log_1_102.arc  102 /log2/log_1_102.arc  103 /log1/log_1_103.arc  103 /log2/log_1_103.arc  104 /log1/log_1_104.arc  104 /log2/log_1_104.arc   You accidentally delete logs 102 and 104 from log 1. You run this command：   BACKUP ARCHIVELOG FROM SEQUENCE 101 UNTIL SEQUENCE 105；   What happens？（）

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.