Assuming that both Class2 and class3 have default constructors, which is (are) valid in a client class?

Question

I class1 c1 = new Class2();

II class2 c2 = new Class3();

III class3 c3 = new Class3();

a. I only
b. II only
c. III only
d. I and II only
e. I, II, and III

Answer 1

Assuming you correctly capitalize your class names and Class3 inherits from Class2 which inherits from Class1, all three are valid. If not, only III is valid with correct capitalization.