11. public class Test {  12. public void foo（） {  13. assert false；  14. assert false；  15. }  16. public void bar（）{  17. while（true）{  18. assert false；  19. }  20. assert false；  21. }  22. }  What causes compilation to fail？（）  A、 Line 13B、 Line 14C、 

第1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.

第2题：

11. static class A {  12. void process（） throws Exception { throw new Exception（）； }  13. }  14. static class B extends A {  15. void process（） { System.out.println（”B”）； }  16. }  17. public static void main（String[] args） {  18. new B（）.process（）；  19. }  What is the result？（） 

• A、 B
• B、 The code runs with no output.
• C、 Compilation fails because of an error in line 12.
• D、 Compilation fails because of an error in line 15.
• E、 Compilation fails because of an error in line 18.

第3题：

public class Test {  public static void main（String [] args） {  boolean assert = true；  if（assert） {  System.out.println（”assert is true”）；  }  }  } Given：  javac -source 1.3 Test.java  What is the result？（） 

• A、 Compilation fails.
• B、 Compilation succeeds with errors.
• C、 Compilation succeeds with warnings.
• D、 Compilation succeeds without warnings or errors.

第4题：

1. interface foo {  2. int k = 0；  3. } 4.    5. public class test implements Foo （  6. public static void main（String args[]） （  7. int i；  8. Test test = new test （）；  9. i= test.k；  10.i= Test.k；  11.i= Foo.k；  12.）  13.）  14.        What is the result？（）  

• A、 Compilation succeeds.
• B、 An error at line 2 causes compilation to fail.
• C、 An error at line 9 causes compilation to fail.
• D、 An error at line 10 causes compilation to fail.
• E、 An error at line 11 causes compilation to fail.

第5题：

11. class Converter {  12. public static void main（String[] args） {  13. Integer i = args[0]；  14. int j = 12；  15. System.out.println（”It is “ + （j==i） + “that j==i.”）；  16. }  17. }  What is the result when the programmer attempts to compile the code and run it with the command java Converter 12？（） 

• A、 It is true that j==i.
• B、 It is false that j==i.
• C、 An exception is thrown at runtime.
• D、 Compilation fails because of an error in line 13.

第6题：

10. interface Foo { int bar（）； }  11. public class Sprite {  12. public int fubar（ Foo foo） { return foo.bar（）； }  13. public void testFoo（） {  14. fubar（  15. // insert code here  16.）；  17. }  18. }  Which code， inserted at line 15， allows the class Sprite to compile？（） 

• A、 Foo { public int bar（） { return 1； } }
• B、 new Foo { public int bar（） { return 1； } }
• C、 newFoo（） { public int bar（）{return 1； } }
• D、 new class Foo { public int bar（） { return 1； } }

第7题：

1. package foo；  2.    3. import java.util.Vector；  4.    5. private class MyVector extends Vector {  6. int i = 1；  7. public MyVector（）  {  8. i = 2；  9.    }  10. }  11.    12. public class MyNewVector extends MyVector {  13. public MyNewVector （）  {  14. i = 4；  15. }  16. public static void main （String args []）  {  17. MyVector v = new MyNewVector（）；  18.   }  19. }     The file MyNewVector.java is shown in the exhibit.  What is the result？（）  

• A、 Compilation will succeed.
• B、 Compilation will fail at line 5.
• C、 Compilation will fail at line 6.
• D、 Compilation will fail at line 14.
• E、 Compilation will fail at line 17.

第8题：

11. public void testIfA（） {  12. if（testIfB（”True”）） {  13. System.out.println（”True”）；  14. } else {  15. System.out.println（”Not true”）；  16. }  17. }  18. public Boolean testIfB（String str） {  19. return Boolean.valueOf（str）；  20. }  What is the result when method testIfA is invoked？（） 

• A、 True
• B、 Not true
• C、 An exception is thrown at runtime.
• D、 Compilation fails because of an error at line 12.
• E、 Compilation fails because of an error at line 19.

第9题：

1. public class Test { 2. public static String output =””； 3.  4. public static void foo（int i） { 5. try { 6. if（i==1） { 7. throw new Exception（）； 8. } 9. output += “1”； 10. } 11. catch（Exception e） { 12. output += “2”； 13. return； 14. } 15. finally { 16. output += “3”；17. } 18. output += “4”； 19. } 20.  21. public static void main（String args[]） { 22. foo（0）； 23. foo（1）； 24.  25. }26. } What is the value of the variable output at line 23？（）

第10题：

public class Test{  public static void main（ String[] argv ）{  // insert statement here  }  }   Which statement， inserted at line 3， produces the following output？（）  Exception in thread “main” java.lang.AssertionError： true at Test.main（Test.java：3）  

• A、 assert true；
• B、 assert false；
• C、 assert false ： true；
• D、 assert false == true；
• E、 assert false： false；