Nguyên lý ngôn ngữ lập trình 小テスト3カンペ

1
The declaration of class A is correct but B is wrong

2
f2
fun3
f3
fun2

3
Statement //a is correct but statement //b is wrong

4
(2) – D
(1) – C
(3) – B

5
b = (B) c;
a = (A) c;

6
b, c

7
76

8
a = new B()
c = new D()

9
print(x + y) will give the result 8
print(y * x) will give the result 15

10
a (if b is referred to a B object)
c (if b is referred to a C object}