第1題：
Which of the following range of short is correct? 
a:-27 -- 27-1  b:0 -- 216-1 c:215 -- 215-1 d:–231 -- 231-1
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第2題：
Which declarations of identifiers are legal? 
A. $persons B. TwoUsers C. *point D. this E. _endline 
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第3題：
Which statement of assigning a long type variable to a hexadecimal value is correct? 
A. long number = 345L; B. long number = 0345; C. long number = 0345L; D. long number = 0x345L. 
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第4題： 
Which of the following fragments might cause errors? 
A. String s = "Gone with the wind"; 
   String t = " good "; 
   String k = s + t; 
B. String s = "Gone with the wind"; 
   String t; 
   t = s[3] + "one"; 
C. String s = "Gone with the wind"; 
   String standard = s.toUpperCase(); 
D. String s = "home directory"; 
   String t = s - "directory". 
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第5題：
class Person { 
      private int a; 
      public int change(int m){ return m; } 
    }    
public class Teacher extends Person { 
      public int b; 
      public static void main(String arg[]){ 
         Person p = new Person(); 
         Teacher t = new Teacher(); 
         int i; 
         // point x       
       } 
    } 
Which are syntactically valid statement at// point x? 
 A. i = m; 
 B. i = b; 
 C. i = p.a;     
 D. i = p.change(30); 
 E. i = t.b. 
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第6題： 
Which layout manager is used when the frame is resized the buttons’s position in the  Frame might be changed? 
A. BorderLayout 
B. FlowLayout 
C. CardLayout 
D. GridLayout 
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第7題：  
Given the following code fragment: 
     1) public void create() { 
     2)   Vector myVect; 
     3)   myVect = new Vector();           
     4) } 
Which of the following statements are true? 
A. The declaration on line 2 does not allocate memory space for the variable myVect. 
B. The declaration on line 2 allocates memory space for a reference to a Vector object. 
C. The statement on line 2 creates an object of class Vector. 
D. The statement on line 3 creates an object of class Vector. 
E. The statement on line 3 allocates memory space for an object of class Vector 
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第8題： 
Which of the following answer is correct to express the value 8 in octal number? 
A. 010 
B. 0x10 
C. 08 
D. 0x8 
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第9題：
Which are not Java keywords? 
A. TRUE 
B. sizeof 
C. const 
D. super 
E. void 
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第10題：
Which of the following statements are true? 
A. The equals() method determines if reference values refer to the same object. 
B. The == operator determines if the contents and type of two separate objects match. 
C. The equals() method returns true only when the contents of two objects match. 
D. The class File overrides equals() to return true if the contents and type of two separate objects match.  
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第11題：
11、Which statements about inheritance are true? 
A. In Java programming language only allows single inheritance.  
B. In Java programming language allows a class to implement only one interface. 
C. In Java programming language a class cannot extend a class and implement a interface together. 
D. In Java programming language single inheritance makes code more reliable. 
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第12題：
1) class Person { 
2)   public void printValue(int i, int j) {/*…*/ } 
3)   public void printValue(int i){/*...*/ } 
4) } 
5) public class Teacher extends Person { 
6)   public void printValue() {/*...*/ } 
7)   public void printValue(int i) {/*...*/} 
8)   public static void main(String args[]){ 
9)       Person t = new Teacher(); 
10)      t.printValue(10); 
11) } 
12) } 
Which method will the statement on line 10 call? 
  
A. on line 2 
B. on line 3 
C. on line 6 
D. on line 7 
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第13題：
Which are not Java primitive types? 
A. short 
B. Boolean 
C. unit 
D. float 
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第14題：  
Use the operators "<<", ">>", which statements are true? 
A. 0000 0100 0000 0000 0000 0000 0000 0000<<5 gives 
   1000 0000 0000 0000 0000 0000 0000 0000 
B. 0000 0100 0000 0000 0000 0000 0000 0000<<5 gives 
   1111 1100 0000 0000 0000 0000 0000 0000 
C. 1100 0000 0000 0000 0000 0000 0000 0000>>5 gives 
   1111 1110 0000 0000 0000 0000 0000 0000 
D. 1100 0000 0000 0000 0000 0000 0000 0000>>5 gives 
   0000 0110 0000 0000 0000 0000 0000 0000 
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第15題：
Which of the following range of int is correct? 
A. -27 -- 27-1  
B. 0 – 232-1  
C. –215 -- 215-1  
D. –231 -- 231-1  
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第16題：
Which keyword should be used to enable interaction with the lock of an object? The flag allows exclusive access to that object. 
A. transient 
B. synchronized 
C. serialize 
D. static 
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第17題：
Which is the return type of the method main()? 
A. int 
B. void 
C. boolean 
D. static 
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第18題：
Given the following code: 
if (x>0) { System.out.println("first"); } 
else if (x>-3) { System.out.println("second"); } 
     else { System.out.println("third"); } 
Which range of x value would print the string "second"? 
A. x > 0 
B. x > -3 
C. x <= -3 
D. x <= 0 & x > -3 
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第19題： 
Given the following expression about TextField which use a proportional pitch font.  
TextField t = new TextField("they are good",40); 
Which statement is true? 
  
A. The displayed string can use multiple fonts. 
B. The maximum number of characters in a line will be 40. 
C. The displayed width is exactly 40 characters. 
D. The user can edit the characters. 
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第20題：  
Which statements about the garbage collection are true? 
  
A. The program developer must create a thread to be responsible for free the memory. 
B. The garbage collection will check for and free memory no longer needed. 
C. The garbage collection allow the program developer to explicity and immediately free the memory. 
D. The garbage collection can free the memory used java object at expect time. 
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第21題：
21、Which of the following assignment is not correct? 
A. float f = 11.1; 
B. double d = 5.3E12; 
C. double d = 3.14159; 
D. double d = 3.14D. 
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第22題： 
Given the uncompleted code of a class: 
    class Person { 
       String name, department; 
       int age; 
       public Person(String n){ name = n; } 
       public Person(String n, int a){ name = n; age = a; } 
       public Person(String n, String d, int a) { 
         // doing the same as two arguments version of constructor  
         // including assignment name=n,age=a 
         department = d; 
       } 
     } 
Which expression can be added at the "doing the same as..." part of the constructor?  
A. Person(n,a); 
B. this(Person(n,a)); 
C. this(n,a); 
D. this(name,age). 
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第23題： 
Which of the following statements about variables and their scopes are true? 
A. Instance variables are member variables of a class. 
B. Instance variables are declared with the static keyword. 
C. Local variables defined inside a method are created when the method is executed. 
D. Local variables must be initialized before they are used. 
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第24題：
public void test() { 
      try { oneMethod(); 
            System.out.println("condition 1"); 
      } catch (ArrayIndexOutOfBoundsException e) { 
            System.out.println("condition 2"); 
     } catch(Exception e) { 
           System.out.println("condition 3"); 
     } finally { 
           System.out.println("finally"); 
     } 
   } 
Which will display if oneMethod run normally? 
A. condition 1 
B. condition 2 
C. condition 3 
D. finally 
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