Solutions to the Exam

1. b
2. b
3. a
4. d
5. c
6. d
7. c
8. a
9. b
10. a
11. b
12. d
13. b - originally keyed wrong
14. a
15. a
16. d
17. a - originally keyed wrong
18. c
19. c
20. c

21. World w = new World ();
    Turtle t = new Turtle (w);
    t.setPenColor (java.awt.Color.red);
    int distance = SimpleInput.getIntNumber("Enter a positive integer.");
    
    int i;
    
    for (i = 0 ; i < 4; i++)
      {
       t.forward (distance);
       t.turn (-90);
      }
    
    t.turn (90);
    t.penUp();
    t.forward (distance/2);
    t.penDown();
    
    t.setPenColor (java.awt.Color.blue);
    
    for (i = 0 ; i < 4; i++)
      {
       t.forward (distance);
       t.turn (-90);
      }
    
    w.show();  // not required by the answer
    

22. Picture p = new Picture (400,600);
    Turtle t = new Turtle (p);
    int x;
    for (x = 0 ; x < 12 ; x++)
      {
       t.forward (20);
       t.turn (360/12);
      }
    String filename = FileChooser.pickAFile();
    p.write (filename);
    p.show();  // not required by the answer