94. Given:
1. public class Foo { 2. public static void main (String []args) { 3. int i = 1; 4. int j = i++; 5. if ((i>++j) && (i++ ==j)) { 6. i +=j; 7. } 8. } 9. }
What is the final value of i?
A.1 B.2 C.3 D.4 E.5
95. Click the exhibit button:
1. public class X { 2. public static void main (String[]args) { 3. string s = new string (“Hello”); 4. modify(s); 5. System.out.printIn(s); 6. } 7. 8. public static void modify (String s) { 9. s += “world!”; 10. } 11. }
What is the result?
A.The program runs and prints “Hello”. B.An error causes compilation to fail. C.The program runs and prints “Hello world!”. D.The program runs but aborts with an exception.
96. Which two are equivalent? (Choose Two)
A.16>4 B.16/2 C.16*4 D.16>>2 E.16/2^2 F.16>>>2
97. Click the exhibit button
1. public class X { 2. public static void main (String[]args) { 3. int [] a = new int [1] 4. modify(a); 5. System.out.printIn(a[0]); 6. } 7. 8. public static void modify (int[] a) { 9. a[0] ++; 10. } 11. }
What is the result?
A. The program runs and prints “0”. B. The program runs and prints “1”. C. The program runs but aborts with an exception. D. An error “possible undefined variable” at line 4 causes compilation to fail. E. An error “possible undefined variable” at line 9 causes compilation to fail.
98. Given:
13. public class Foo { 14. public static void main (String [] args) { 15. StringBuffer a = new StringBuffer (“A”); 16. StringBuffer b = new StringBuffer (“B”); 17. operate (a,b); 18. system.out.printIn{a + “,” +b}; 19. ) 20. static void operate (StringBuffer x, StringBuffer y) { 21. y.append {x}; 22. y = x; 23. ) 24. }
What is the result?
A.The code compiles and prints “A,B”. B.The code compiles and prints “A, BA”. C.The code compiles and prints “AB, B”. D.The code compiles and prints “AB, AB”. E.The code compiles and prints “BA, BA”. F.The code does not compile because “+” cannot be overloaded for stringBuffer.
99. Given:
1. public class X { 2. public static void main (String[] args) { 3. byte b = 127; 4. byte c = 126; 5. byte d = b + c; 6. } 7. }
Which statement is true?
A.Compilation succeeds and d takes the value 253. B.Line 5 contains an error that prevents compilation. C.Line 5 throws an exception indicating “Out of range”. D.Line 3 and 4 contain error that prevent compilation. E.The compilation succeeds and d takes the value of 1.
100. Given:
1. public class WhileFoo { 2. public static void main (String []args) { 3. int x= 1, y = 6; 4. while (y--) {x--;} 5. system.out.printIn(“x=” + x “y =” + y); 6. } 7. }
What is the result?
A.The output is x = 6 y = 0 B.The output is x = 7 y = 0 C.The output is x = 6 y = -1 D.The output is x = 7 y = -1 E.Compilation will fail
101. Which statement is true?
A. The Error class is a untimeException. B. No exceptions are subclasses of Error. C. Any statement that may throw an Error must be enclosed in a try block. D. Any statement that may throw an Exception must be enclosed in a try block. E. Any statement that may thro a runtimeException must be enclosed in a try block.
102. Click the exhibit button:
1. int I=1, j=0 2. 3. switch(i) { 4. case 2: 5. j+=6; 6. 7. case 4: 8. j+=1; 9. 10. default: 11. j +=2; 12. 13. case 0: 14. j +=4; 15. } 16.
What is the value of j at line 16?
A. 0 B. 1 C. 2 D. 4 E. 6
103. Given:
1. switch (i) { 2. default: 3. System.out.printIn(“Hello”); 4. )
What is the acceptable type for the variable i?
A.byte B.long C.float D.double E.object F.A and B G.C and D
104. You need to store elements in a collection that guarantees that no duplicates are stored. Which two interfaces provide that capability? (Choose Two)
A. java.util.Map B. java.util.Set C. java.util.List D. java.util.StoredSet E. java.util.StoredMap F. java.util.Collection
105. Which statement is true for the class java.util.ArrayList?
A. The elements in the collection are ordered. B. The collection is guaranteed to be immutable. C. The elements in the collection are guaranteed to be unique. D. The elements in the collection are accessed using a unique key. E. The elements in the collections are guaranteed to be synchronized.
106. Click the exhibit button:
1. public class X implements Runnable( 2. private int x; 3. private int y; 4. 5. public static void main(String[]args) 6. X that = new X(); 7. (new Thread(that)).start(); 8. (new Thread(that)).start(); 9. ) 10. 11. public void run() ( 12. for (;;) ( 13. x++; 14. y++; 15. System.out.printIn(“x=” + x + “, y = ” + y); 16. ) 17. ) 18. )
What is the result?
A. Errors at lines 7 and 8 cause compilation to fail. B. The program prints pairs of values for x and y that might not always be the same on the same line (for example, “x=2, y=1”). C. The program prints pairs of values for x and y that are always the same on the same line (for example, “x=1, y=1”. In addition, each value appears twice (for example, “x=1, y=1” followed by “x=1, y=1”). D. The program prints pairs of values for x and y that are always the same on the same line (for example, “x=1, y=1”. In addition, each value appears only for once (for example, “x=1, y=1” followed by “x=2, y=2”).
107. Given:
1. public class SyncTest { 2. private int x; 3. private int y; 4. public synchronized void setX (int i) (x=1;) 5. public synchronized void setY (int i) (y=1;) 6. public synchronized void setXY(int 1)(set X(i); setY(i);) 7. public synchronized Boolean check() (return x !=y;) 8. )
Under which conditions will check () return true when called from a different class?
A. check() can never return true B. check() can return true when setXY is called by multiple threads C. check() can return true when multiple threads call setX and setY separately. D. Check() can only return true if SyncTest is changed to allow x and y to be set separately.
108. Which is a method of the MouseMotionListener interface?
A. Public void mouseDragged(MouseEvent) B. Public boolean mouseDragged(MouseEvent) C. Public void mouseDragged(MouseMotionEvent) D. Public boolean MouseDragged(MouseMotionEvent) E. Public boolean mouseDragged(MouseMotionEvent)
109. Given:
4. String foo = “base”; 5. foo.substring(0,3); 6. foo.concat(“ket”); 7. foo += “ball”; 8.
Type the value of foo at line 8.
110. Given:
1. public class Test { 2. public static void leftshift(int i, int j) { 3. i<<=j; 4. } 5. public static void main(String args[]) { 6. int i = 4, j = 2; 7. leftshift(i, j); 8. System.out.printIn(i); 9. } 10. }
What is the result?
A.2 B.4 C.8 D.16 E.The code will not compile
111. Given:
1. public class Foo { 2. private int val; 3. public foo(int v) (val = v;) } 4. public static void main (String [] args) { 5. Foo a = new Foo (10); 6. Foo b = new Foo (10); 7. Foo c = a; 8. int d = 10; 9. double e = 10.0; 10. } 11. }
Which three logical expressions evaluate to true? (Choose Three)
A.(a ==c) B.(d ==e) C.(b ==d) D.(a ==b) E.(b ==c) F.(d ==10.0)
112. Click the exhibit button:
1. public class X { 2. private static int a; 3. 5. public static void main (String[] args) { 6. modify (a); 7. } 8. 9. public static void modify (int a) { 10. a++; 11. } 12. }
What is the result?
A. The program runs and prints “0”. B. The program runs and prints “1”. C. The program runs but aborts with an exception. D. En error “possible undefined variable” at line 5 causes compilation to fail. E. En error “possible undefined variable” at line 10 causes compilation to fail.
113. Click the exhibit button:
1. public class Test { 2. public static void replaceJ(string text) { 3. text.replace (‘j’, ‘l’); 4. } 5. 6. public static void main(String args[]) { 7. string text = new String (“java”) 8. replaceJ(text); 9. system.out.printIn(text); 10. } 11. }
What is the result?
A. The program prints “lava”. B. The program prints “java”. C. An error at line 7 causes compilation to fail. D. Compilation succeeds but the program throws an exception.
114. Which two are equivalent? (Choose Two)
A.3/2 B.3<2 C.3*4 D.3<<2 E.3*2^2 F.3<<<2
115. What is the numerical range of a char?
A. 0 . . . 32767 B. 0 . . . 65535 C. -256 . . . 255 D. -32768 . . . 32767 E. range is platform dependent
116. Given:
1. public class Test { 2. public static void main (String []args) { 3. unsigned byte b = 0; 4. b--; 5. 6. } 7. }
What is the value of b at line 5?
A.-1 B.255 C.127 D.compilation will fail E.compilation will succeed but the program will throw an exception at line 4
117. Given:
1. public class Foo { 2. public void main (String [] args) { 3. system.out.printIn(“Hello World.”); 4. } 5. }
What is the result?
A.An exception is thrown. B.The code does not compile. C.“Hello World.” is printed to the terminal. D.The program exits without printing anything.
118. Given:
1. //point X 2. public class foo ( 3. public static void main (String[]args) throws Exception { 4. java.io.printWriter out = new java.io.PrintWriter ( 5. new java.io.outputStreamWriter (System.out), true; 6. out.printIn(“Hello”); 7. } 8. }
Which statement at PointX on line 1 allows this code to compile and run?
A. import java.io.*; B. include java.io.*; C. import java.io.PrintWriter; D. include java.io.PrintWriter; E. no statement is needed.
119. Which will declare a method that is available to all members of the same package and can be referenced without an instance of the class?
A.abstract public void methoda(); B.public abstract double methoda(); C.static void methoda(double d1){} D.public native double methoda() {} E.protected void methoda(double d1) {}
120. Which type of event indicates a key pressed on a java.awt.Component?
A. KeyEvent B. KeyDownEvent C. KeyPressEvent D. KeyTypedEvent E. KeyPressedEvent
121. Click the exhibit button:
1. import java.awt.*; 2. 3. public class X extends Frame { 4. public static void main (String [] args) { 5. X x = new X(); 6. x.pack(); 7. x.setVisible(true); 8. } 9. 10. public X() { 11. setLayout (new BordrLayout()); 12. Panel p = new Panel (); 13. add(p, BorderLayout.NORTH); 14. Button b = new Button (“North”); 15. p.add(b): 16. Button b = new Button (“South”); 17. add(b1, BorderLayout.SOUTH): 18. } 19. }
Which two statements are true? (Choose Two)
A. The buttons labeled “North” and “South” will have the same width B. The buttons labeled “North” and “South” will have the same height C. The height of the button labeled “North” can very if the Frame is resized D. The height of the button labeled “South” can very if the Frame is resized E. The width of the button labeled “North” is constant even if the Frame is resized F. The width of the button labeled “South” is constant even if the Frame is resized
122. How can you create a listener class that receives events when the mouse is moved?
A.By extending MouseListener. B.By implementing MouseListener. C.By extending MouseMotionListener. D.By implementing MouseMotionListener. E.Either by extending MouseMotionListener or extending MouseListener. F.Either by implementing MouseMotion Listener or implementing MouseListener.
123. Which statement is true?
A. A grid bag layout can position components such that they span multiple rows and/or columns. B. The “North” region of a border layout is the proper place to locate a menuBar component in a Frame. C. Components in a grid bag layout may either resize with their cell, or remain centered in that cell at their preferred size. D. A border layout can be used to position a component that should maintain a constant size even when the container is resized.
124. You want a class to have access to members of another class in the same package. Which is the most restrictive access modifier that will accomplish this objective?
A. Public B. Private C. Protected D. Transient E. No access modifier is required
125. Which two statements are true regarding the creation of a default constructor? (Choose Two)
A. The default constructor initializes method variables. B. The default constructor invokes the no-parameter constructor of the superclass. C. The default constructor initializes the instance variables declared in the class. D. If a class lacks a no-parameter constructor, but has other constructors, the compiler creates a default constructor. E. The compiler creates a default constructor only when there are no other constructors for the class.
126. Given:
1. public class OuterClass { 2. private double d1 1.0; 3. //insert code here 4. }
You need to insert an inner class declaration at line2. Which two inner class declarations are valid? (Choose Two)
A.static class InnerOne { public double methoda() {return d1;} } B.static class InnerOne { static double methoda() {return d1;} } C.private class InnerOne { public double methoda() {return d1;} } D.protected class InnerOne { static double methoda() {return d1;} } E.public abstract class InnerOne { public abstract double methoda(); }
127. Which two declarations prevent the overriding of a method? (Choose Two)
A. final void methoda() {} B. void final methoda() {} C. static void methoda() {} D. static final void methoda() {} E. final abstract void methoda() {}
128. Given:
1. public class Test { 2. public static void main (String args[]) { 3. class Foo { 4. public int i = 3; 5. } 6. Object o = (Object) new Foo(); 7. Foo foo = (Foo)o; 8. System.out.printIn(foo. i); 9. } 10. }
