1Z0-042單項選擇題每日一練(2019.01.23)

You executed the following command to start the database： 
SQL> STARTUP 
ORACLE instance started. 
Total System Global Area 281018368 bytes 
Fixed Size 789000 bytes 
Variable Size 229635576 bytes 
Database Buffers 50331648 bytes 
Redo Buffers 262144 bytes
ORA-00205： error in identifying controlfile， check alert log for more info 
Which view would you query at this stage to investigate this missing control file？（）

You work as a database administrator for Certkiller .com. You are using Recovery Manager （RMAN） for backup and recovery of your database. You executed the delete command in RMAN to delete a backup of atablespace. Which statement is true in this scenario？（）