Question

A program written in an object oriented language includes three classes, A, B and C. Classes B and C are sub-classes of Class A, but objects of Classes B only interract with those of Class A -- objects from Classes B and C do not interact. If a change is made to Class B, and to avoid extraneous testing, which testing approach should you take?

Test Class A only

Test Class B only

Test Classes A and B only

Test Classes A, B and C

Answer 1

C. Test Classes A and B only