CS 111 - Fall 2012

Exam 1 Solutions

Note that for the write code questions, the web page removes the indentation originally given to the code.

1. B
2. D
3. C
4. E
5. E
6. E
7. C
8. D
9. B
10. A
11. B
12. D
13. A
14. D
15. C
16. B
17. E
18. B
19. D
20. E
21. Picture p;
    p = new Picture(640, 480);
    Turtle t;
    t = new Turtle (p);
    int count;
    
    t.setPenColor (Color.BLUE);
    
    count = 0;
    while ( count < 4)
    {
    t.forward (50);
    t.turn (90);
    count = count + 1;
    }
    
    t.penUp();
    t.forward (100);
    t.penDown();
    
    t.setPenColor (Color.RED);
    
    count = 0;
    while ( count < 4)
    {
    t.forward (50);
    t.turn (90);
    count = count + 1;
    }
    
    p.show();
22. 
    // Start a new method
    public static void drawDodecagon (Turtle tParam, int len, Color c)
    {
    Color temp = tParam.getPenColor();
    tParam.setPenColor (c);
    int count;
    int sides;
    
    sides = 12;
    count = 0;
    while ( count < sides)
    {
    tParam.forward (len);
    tParam.turn (360/sides);
    count ++;
    }
    
    tParam.setPenColor (temp);
    } // end of the new method

• Exam1Q2122.java: Java program containing the code for both Q21 and Q22