CS 120A   Fall 2001,  Instructor:  Jeffrey Horn    QUIZ 1:  Take-Home      Name:  _____________________
handed out Monday, Nov. 5, 2001            

due Wednesday, Nov. 7, 2001  (end-of-day)  in my dept. mailbox, or fax (227-2020), or email, or WebCT, or whatever

1. How many times will the body of the loop below be executed?  (for partial credit, show the output)

int n;
n = 250;
while (n > 0)
   { n -= 15;
     System.out.println("The current value of n is" + n);  
    };

 

2. What is the output of the following?


int n;
n = 2;
while (n < 100
   { n = n*4;
     g.drawString(20,n,"The current value of n is" + n);
    };

3. Which of the following are valid names for VARIABLES in Java?
1. "jeff"
2. "sarah787"
3. "pushing_an_elephant"
4. "c_u_later"
5. "2_out_of_3_aint_bad"
6. "why_not?"
7. "that's_why_not"
8. ")(%&$(%*"
9. "gjafkjgrqiturq"
4. Which of the above is a valid METHOD name?
5. Which of the above is a valid CLASS name?
6. What is the value of "x" after the following code is executed?

int x;
x = 2;
if (12 > 25/2)
   x += 10;
    else x -=5;
7. Assume the following method is already written, and debugged!  Read the comment to see what it does.  Then write a "paint" method that calls "paintMonster" to draw 10 monsters of increasing size in a diagonal (going down and to the right).

// "paintMonster(x,y,size)" draws a way cool monster centered at position

//  x,y in the window of Graphics object g, making the monster of size "size"

//  which is actually about "size" pixels wide, and 2 * size pixels high.

//  (x,y, and size are all int's here, and the unit is pixels.)

private void paintMonster(Graphics g, int x, int y, int size)

    {   //assume this part is written, details don't matter!

     }