Programming Practice

Which of these lines of JS code are syntactically correct?

• rect(100, 100, 50, 50);

• rect[100, 100, 50, 50];

• rect(100 100 50 50);

• rect(100, 100, 50, 50):

Which of these lines of JS code are syntactically correct?

• ellipse(100; 100; 50; 50);

• ellipse(100 100 50 50);

• ellipse  (100, 100, 50, 50)

• ellipse(100, 100, 50, 50);

In the  Khan Academy programming environment, where is the point (0, 0)?

• upper left corner

• center

• upper right corner

• 
  lower left corner

How many parameters should you pass to the line() function?

• 1

• 2

• 4

• 6

Which of these function calls draws a perfect circle?

• ellipse(100, 100, 200, 50);

• ellipse(50, 200, 100, 100);

• ellipse(50, 100, 100, 200);

• ellipse(100, 50, 200, 100);

For the line() function, what numbers should you pass to the third and fourth parameters?

• The width and height of the line

• The end x position and end y position of the line

• 
  The amount to rotate and skew the line

• Your 2 favorite numbers in the world

Which of these function calls draws a square?

• rect(100, 100, 75, 60);

• rect(75, 60, 100, 100);

• rect(100, 60, 75, 100);

• rect(60, 100, 100, 75);

What ProcessingJS function can you call to change the color of the entire canvas?

• setBackground()

• background()
  

• canvasColor()

• fill()

What function should you call to change the color of a line in your program?

• 
  fill()

• outline()

• stroke()

• color()

If you're programming a drawing, where should your background() call be?

• 
  At the beginning of the program

• At the end of the program

• At the beginning AND end of the program

• After the first rect()