Animation and Games Review

Front

What does this program do?

Back

Animates a ball by moving it down and to the right once every 20 milliseconds.

Front

Which of the following statements are true about ball? I – ball is a local variable II – the ball variable in draw is different from the ball variable in start III – ball is a global variable IV – ball’s scope includes both start and draw

Back

III and IV

Front

Which statement would stop the animation in this program? Options: stopTimer(ball.move(2, 2));, stopTimer(draw);, stopTimer(draw());, stopTimer(draw, 20);

Back

stopTimer(draw);

Front

How many times will the ball be moved before the animation stops?

Back

25

Front

Which of the following are techniques that make our code more reusable? I – Using constants instead of magic numbers II – Using specific values in our functions rather than using parameters III – Writing multiple functions that solve small subproblems rather than one function that solves the entire problem. IV – Writing as few lines of code as possible

Back

I and III, and IV

Front

Which function has better reusability?

Back

Front

How many circles of radius 10 will fit vertically stacked in a window that has height 100? The circles should not overlap, the bottom of one circle should touch the top of the next circle.

Back

5

Front

This is a circle on our canvas named ball. What are the coordinates of point A?

Back

ball.getX() + ball.getRadius(), ball.getY()

Front

What statement should we use to determine if a ball is hitting the bottom edge of the window?

Back

Front

How can we determine if ball’s left edge is hitting a different shape on our canvas named box?

Back