053-331

Which of the following represents the correct way to perform an online recovery of datafile 4, which is assigned to a tablespace called USERS?
A. shutdown restore datafile 4; recover datafile 4; alter database open;
B. Sql alter database datafile 4 offline; restore datafile 4; recover datafile 4; alter database open;
C. Sql alter database datafile 4 offline; restore datafile 4; Sql alter database datafile 4 online;
D. Sql alter database datafile 4 offline; restore database datafile 4; recover database datafile 4; Sql alter database datafile 4 online;
E. Sql alter database datafile 4 offline; restore datafile 4; recover datafile 4; Sql alter database datafile 4 online;

　　此题和323类似datafile 4不是关键文件故可以offline来还原