Specifying a key ensures that no two objects belonging to a class have the same value for the key attribute(s).

ODL supports which of the following types of association relationships?

A. Unary

B. Unary and Binary

C. Unary and Binary and Ternary

D. Unary and Binary and Ternary and higher

An extent is which of the following?

A. A keyword that indicates that the subclass inherits from a superclass

B. A keyword that indicates that the superclass inherits from a subclass

C. The set of all instances of a class within a database

D. Only one instance of a class within a database

Identify the class name for the following code: ABC123 course();

A. ABC123

B. course

C. course()

D. All of the above

Using ODL, you can define which of the following?

A. Attribute

B. Structure

C. Operation

D. All of the above