Question

Consider classes A, B and C, where A is an abstract superclass, B is a concrete class that inherits from A and C is a concrete class that inherits from B. Class A declares abstract method originalMethod, implemented in class B. Which of the following statements is true of class C.

Answer 1

Answer:

d. None of the above.

Explanation:

a. Method originalMethod cannot be overridden in class C—once it has been implemented in concrete class B, it is implicitly final.

b. Method originalMethod must be overridden in class C, or a compilation error will occur.

c. If method originalMethod is not overridden in class C but is called by an object of class C, an error occurs.

d. None of the above.