Which three table transformations can be done using online redefinition of tables？（）

You have just run this syntax to start the listener from the Listener Control utility：  
LSNRCTL>START  
Starting /mstgelai/oracle/bin/tnslsnr： please wait… 
System parameter file is /u01/oracle/network/admin/listener.ora Log messages written to /u01/oracle/network/log/listener.log 
Listening on： （DESCRIPTION=（ADDRESS=（PROTOCOL=tcp）（HOST=stc-sun01-server）（PORT=1521））） Connecting to… 
The command completed successfully  
What is the name of the Listener you started？（）

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？（）

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？（）