試題詳解

10. abstract public class Employee { 

11. protected abstract double getSalesAmount()； 

12. public double getCommision() { 

13. return getSalesAmount() * 0.15；

 14. } 

15. }

 16. class Sales extends Employee { 

17. //insert method here 

18. }

 Which two methods, inserted independently at line 17, correctly complete the Sales class? (Choose two.)
(A) double getSalesAmount() { return 1230.45； }
(B) public double getSalesAmount() { return 1230.45； }
(C) private double getSalesAmount() { return 1230.45； }
(D) protected double getSalesAmount() { return 1230.45； }