单项选择题

33. try {
34. // some code here
35. } catch （NullPointerException e1） {
36. System.out.print（”a”）；
37. } catch （RuntimeException e2） {
38. System.out.print（”b”）；
39. } finally {
40. System.out.print（”c”）；
41. }
What is the result if a NullPointerException occurs on line 34？（）

A. c
B. a
C. ab
D. ac
E. bc
F. abc

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多项选择题

Class TestException
1. public class TestException extends Exception {
2. } Class a：
1. public class a {
2.
3. public String sayHello（String name） throws TestException {
4.
5. if（name == null） {
6. throw new TestException（）；
7. }
8.
9. return “Hello “+ name；
10. }
11.
12. }
A programmer wants to use this code in an application：
45. A a=new A（）；
46. System.out.println（a.sayHello（”John”））；
Which two are true？（）

A. Class a will not compile.
B. Line 46 can throw the unchecked exception TestException.
C. Line 45 can throw the unchecked exception TestException.
D. Line 46 will compile if the enclosing method throws a TestException.
E. Line 46 will compile if enclosed in a try block， where TestException is caught.

单项选择题

public class SomeException {
} Class a：
public class a {
public void doSomething（） { }
} Class b：
public class b extends a {
public void doSomething（） throws SomeException { }
}
Which is true about the two classes？（）

A. Compilation of both classes will fail.
B. Compilation of both classes will succeed.
C. Compilation of class a will fail. Compilation of class b will succeed.
D. Compilation of class a will fail. Compilation of class a will succeed.

单项选择题

23.int z=5；
24.
25. public void stuff1（int x） {
26. assert （x> 0）；
27. switch（x） {
28. case 2： x= 3；
29. default： assert false； } }
30.
31. private void stuff2（int y） { assert （y < 0）； }
32.
33. private void stuff3（） { assert （stuff4O）； }
34.
35. private boolean stuff4（） { z = 6； return false； }
Which is true？（）

A. All of the assert statements are used appropriately.
B. Only the assert statement on line 31 is used appropriately.
C. The assert statements on lines 29 and 31 are used appropriately.
D. The assert statements on lines 26 and 29 are used appropriately.
E. The assert statements on lines 29 and 33 are used appropriately.
F. The assert statements on lines 29， 31， and 33 are used appropriately.
G. The assert statements on lines 26， 29， and 31 are used appropriately.