In the code fragment below, line 4 is executed.
1.      String s1 = “xyz”;
2.      String s2 = “xyz”;
3.      If (s1 = = s2)
4.         System.out.println(“Line 4”)

A.   True
B.    False
C.  An exception is thrown
D.   A compilation error occurs
E.   The operating systems stops responding

A Java program creates a check box using the code listed below. The program is run on two different platforms. Which of the statements following the code are true? (Choose one or more)

1.      Checkbox cb = new Checkbox(“Autosave”);
2.      Font f = new Font(“Courier”, Font.PLAIN, 14);
3.      cb.setFont(f); 

A. The check box will be the same size on both platforms, because Courier is a standard Java font.
B. The check box will be the same size on both platforms, because Courier is a fixed-width font. 
C.  The check box will be the same size on both platforms, provided both platforms have identical    14-point Courier fonts.                     
D. The check box will be the same size on both platforms, provided both platforms have identical check-box decorations.
E. There is no way to guarantee that the buttons will be the same size on both platforms.

 What is the result of compiling and running the following application?

 
1.      Import java.awt.*;
2.
3.      public class Q3 extends Frame {
4.          Q3( ) {
5.               / / Use Grid layout manager.
6.              setSize(300, 300);
7.              setLayout(new GridLayout(1, 2));
8.       
9.             / / Build and add 1^st panel.
10.         Panel p1 = new Panel ( );
11.         p1.setLayout(new FlowLayout(FlowLayout.RIGHT));
12.         p1.add(new Button(“Hello”));
13.         add(p1);
14.   
15.        / / Build and add 2^nd panel.
16.        Panel p2 = new Panel ( );
17.        p2.setLayout(new FlowLayout(FlowLayout.LEFT));
18.        p2.add(new Button(“Goodbye”));
19.       add(p2);
20.       }
21.   
22.       public static void main(String args[ ]) {
23.           Q3 that = new Q3 ( );
24.            that.setVisible(true);
25.       }
26.  }

A. The program crashes with an exception at line 7, because the frame’s default layout manager cannot be overridden.
B. The program crashes with an exception at line 7, because a Grid layout manager must have at least two rows and two columns.
C.  The program displays two buttons, which are just large enough to encompass their labels. The buttons appear at the top of the frame. The “Hello” button is just to the left of the vertical midline of the frame; the “Goodbye” button is just to the right of the vertical midline of the frame.
D. The program displays two large buttons. The “Hello” button occupies the entire left half of the frame, and the “Goodbye” button occupies the entire right half of the frame.
E. The program displays two buttons, which are just wide enough to encompass their labels. The buttons are as tall as the frame. The “Hello” button is just to the left of the vertical midline of the frame; the “Goodbye” button is just to the right of the vertical midline of the frame.  

If a frame uses its default layout manager and does not contain any panels, then all the components within the frame are the same width and height.

A. True
B. False
C. Component on the top will be greater in size than the bottom component
D.  Component at the bottom will be greater in size than the top  component
E. The components cannot be used as the frame does not have any panels

How would you set the color of a graphics context called g to cyan?

A.  g.setColor(Color.cyan);
B.  g.setCurrentColor(cyan);
C.  g.setColor("Color.cyan");
D.  g.setColor("cyan");
E.  g.setColor(new Color(cyan)); 

When the GUI thread calls paint( ) in order to repair exposure damage, the paint( ) method must determine what was damaged and set its clip region appropriately.

A.  True
B.  False
C.  The refresh() method must be called immediately after the paint() method.
D.  The paintcanvas() sets the clip region appropriately.
E.  GUI thread calls repaint( ) in order to repair exposure damage.

A.  A circle at (100, 100) with radius of 44
B.  A circle at (100, 44) with radius of 100
C.  A circle at (100, 44) with radius of 44
D.  The code does not compile
E.   An ellipse at(50,22) with radius of 22

A. UTF characters are all 8 bits.  
B. UTF characters are all 16 bits. 
C. UTF characters are all 24 bits.   
D. Unicode characters are all 16 bits.  
E.  Bytecode characters are all 16 bits.

1. File f1 = new File("dirname");
2. File f2 = new File(f1, "filename");

A. A new directory called dirname is created in the current working directory. 
B.  A new directory called dirname is created in the current working directory. A new file called filename is created in directory dirname.
C.    A new directory called dirname and a new file called filename are created, both in the current working directory.
D.  A new file called filename is created in the current working directory.
E.  No directory is created, and no file is created. 

The File class contains a method that changes the current working directory.

A.  True
B.  False
C.  The Directory Class   contains a method that changes the current working directory.
D.  The File class contains a method called chgcwd() that changes the current working directory.
E.   Output streams have to be used to change the current working directory.

1. try {
2. FileOutputStream fos = new FileOutputStream("destfile");
3. DataOutputStream dos = new DataOutputStream(fos);
4. dos.writeInt(3);
5. dos.writeDouble(0.0001);
6. dos.close( );
7. fos.close( );
8. }
9. catch (IOException e) { }

A.  2
B.  8
C.  12
D.  16
E.   The number of bytes depends on the underlying system.

1. try {
2. RandomAccessFile raf = new RandomAccessFile _ ("datafile"), "rw";
3. BufferedOutputStream bos = new BufferOutput _ Stream(raf);
4. DataOutputStream dos = new DataOutputStream(bos);
5. dos.writeDouble(Math.PI);
6. dos.close( );
7. bos.close( );
8. raf.close( );
9. } catch (IOException e) { }

A.  The code fails to compile.
B.  The code compiles, but throws an exception at line 3.
C.  The code compiles and executes, but has no effect on the local file system.
D.  The code compiles and executes; afterward, the current working directory contains a file called datafile.
E.   The code compiles, but throws an exception at line 5.

1. g.setColor(Color.black);
2. g.drawLine(10, 10, 10, 50);
3. g.setColor(Color.red);
4. g.drawRect(100, 100, 150, 150);

A.  A red vertical line that is 40 pixels long and a red square with sides of 150 pixels.
B.  A black vertical line that is 40 pixels long and a red square with sides of 150 pixels.
C.  A black vertical line that is 50 pixels long and a red square with sides of 150 pixels.
D.  A red vertical line that is 50 pixels long and a red square with sides of 150 pixels.
E.  A black vertical line that is 40 pixels long and a red square with sides of 100 pixels.  

What code would you use to construct a 24-point bold serif font?

A.  new Font(Font.SERIF, 24, Font.BOLD);
B.  new Font("Serif", 24, "Bold");
C.  new Font("Bold", 24, Font.SERIF);
D.  new Font("Serif", Font.BOLD, 24);
E.  new Font("SERIF", Font.BOLD, 24);

1. public void paint(Graphics g) {
2. g.drawString("qusetion #9", 10, 0);
3. }

A.  The string "question#9", with its top-left corner at 10, 0.
B.  A little squiggle coming down from the top of the component, a little way in from the left edge.
C.  The string "question#9", with its top-left corner at 0,10.
D.  The Program fails to compile
E.   An IO exception is thrown and the system fails to respond.

A.  new TextArea(80, 10)
B.  new TextArea(10, 80)
C.   new Text(Area,10,80)
D.   new Text(l,b,10,80)
E.  None of the above

A.  The text field becomes wider.
B.  The text field becomes narrower.
C.   The text field stays the same width; to see the entire contents you will have to scroll by using the and keys.
D.  The text field stays the same width,to see the entire contents you will have to scroll by using the text field’s horizontal scroll bar.
E.   The program throws and OutOfBounds() exception 

1. TextField tf = new TextField("Not a trick question");
2. FocusListener flis1 = new F1( );
3. FocusListener fils2 = new F2( );
4. tf.addFocusListener(flis1);
5. tf.addFocusListener(flis2);
6. tf.removeFocusListener(flis1);

A.  Lines 2 and 3 generate compiler errors.
B.  Line 6 generates a compiler error.
C.  Line 5 throws an exception at run time.
D.  Line 6 throws an exception at run time.
E. The code compiles cleanly and executes without throwing an exception.

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