Midterm Answer Key

General Notes

Key for exam form with first question: "Some allowed suffixes..."

1. (12 Points)
   1. T
   2. F
   3. T
   4. F
   5. F
   6. F
   7. F
   8. T
   9. T
   10. F
   11. T
   12. F
   
   
2. (10 Points)

   The bug: The words "Advantages for Apple" should be enclosed in <title></title> tags

   When the bug is fixed, this HTML will put the words "Advantages for Apple" on the title bar, and the following in the browser window:

   Here are some advantages for Apple.

   • New infusion of cash.
   • Resolved software patent disputes.
   
   
   
3. (6 Points)

   Part 1: 21
   Part 2: 0
   

4. (28 Points)

   • StringField s1Field;
     StringField s2Field; // the declarations were optional on the exam
     s1Field = new StringField();
     s2Field = new StringField();
     s1Field.setLabel("next");
     add(s1Field);
     add(s2Field);
     

   • s1Field.setString("hi there");
     s2Field.setString("yes sir");
     

   • String s1;  // this declaration was optional on the exam
     s1 = s2Field.getString();
     s1= s1 + "A";
     s2Field.setString(s1);
     

   • String s1; // this declaration was optional on the exam
     s1 = s2Field.getString();
     s1 = s1.substring(0,s1.length()-1);
     s2Field.setString(s1);
     

   • String s1; // this declaration was optional on the exam
     s1 = s1Field.getString();
     if (s1.indexOf("x") > -1)
     {
        s2Field.setString("Yes");   
     } 
     

   • String s1; // this declaration was optional on the exam
     s1 = s2Field.getString();
     s1 = s1.substring(0, s1.indexOf("X") + 1);
     s2Field.setString(s1);
     

   
   
5. (16 points)

   • public double disprice()
     {
        price = price - price * 0.15;
        return price;
     }
     

   • public void authoradd(String s1, String s2)
     {
        author = s1 + author + s2;
     }
     

   
   
6. (8 Points)

   
   

   INDEX	0	1	2	3	4	5	6	7	8	9
   VALUE	17	10	2	6	10	15	11	16	22	23

   
   

7. (26 Points)

   
   

   import java.awt.*;
   import awb.*;
   
   public class e1 extends java.applet.Applet
   {
      double rr[];
      int i, numZeros;
      Button x1;
      IntField s1Field;
      
      public void init()
      {
         rr = new double[100];
         Button x1 = new Button("X1");
         s1Field = new IntField();
         s1Field.setLabel("Answer");
         add(s1Field);
         add(x1);
      }
   
      public boolean action(Event e, Object obj)
      {
         if (e.target == x1)
         {
            i = 0;
            numZeros = 0;
   	 while (i < 100)
            {
   	    if (rr[1] == 0)
       	    {
   	       numZeros = numZeros + 1;
   	    }
   	    i = i + 1;
   	 }
            s1Field.setInt(numZeros);
   	 return true;
         }
         return true;
      }
   }