OCP 1Z0 051 QUESTION NO: 54

QUESTION NO: 54 
 
Which statements are correct regarding indexes? (Choose all that apply.)
 
 
A. For each data manipulation language (DML) operation performed, the corresponding indexes
are automatically updated. 
B. A nondeferrable PRIMARY KEY or UNIQUE KEY constraint in a table automatically creates a
unique index. 
C. A FOREIGN KEY constraint on a column in a table automatically creates a non unique key 
D. When a table is dropped, the corresponding indexes are automatically dropped 
 
Answer: A,B,D

与正式题库46重复

http://blog.csdn.net/jgmydsai/article/details/26165171