328.You have backed up your database using image copies. You have lost the SYSTEM tablespace and
need to restart your database as quickly as possible. What is the correct solution?
A. Restore the SYSTEM tablespace from the last backup set and then recover the database.
B. Restore the SYSTEM tablespace image copy using the restore command and then restore the
database.
C. Use the switch datafile command to instantly switch to the datafile copy, recover the tablespace, and
open the database.
D. The database is not recoverable in this situation with image copies.
E. Manually copy the datafile image copy to the correct location and then manually restore the database
from SQL*Plus.
Answer: C
答案解析：
因为是image copy，可以使用switch命令，切换system数据文件的地址，然后recover，再打开数据库。
使用switch命令可以快速切换数据文件的地址。