APCSP 3.7 Debugging

If you want to see each line of code highlighted as your program runs, you should ...

• move the slider to the rabbit and flip the code to block mode.

• move the slider to the rabbit and flip the code to text mode.

• move the slider to the turtle and flip the code to block mode.

• move the slider to the turtle and flip the code to text mode.

Which line(s) of code will cause the code to stop running due to an error and why?

• 1. "screen1" is not named properly

• 2. The word "text" should be in quotes

• 4. The word "blue" should not be in quotes

• 5. The word "Arial" should be in quotes

What are the dimensions of a screen in app lab?

• width = 2.5 inches, height = 4.25 inches

• width = 320 pixels, height = 450 pixels

• they vary, the screen can be resized

• width = 340 mm, height = 560 mm

When should you put an onEvent block inside another onEvent block?

• Only when you are playing sounds.

• Anytime you want to make your code shorter.

• You almost always want to do this.

• You almost never want to do this.

What do we call the process of finding and correcting errors in our code?

(a)  

Sometimes app lab can identify a bug in your code before you even run it. What symbol does app lab use to indicate a problem with your code?

• a red "X"

• a yellow triangle

• a blue exclamation mark

• a green question mark

There is no need to debug your code as long as it runs without producing an error.

• True

• False

This code will produce colors that are random shades of ...

• reds and oranges

• purples and pinks

• blues and greens

• yellows and browns

Determine the x and y properties to place this duck image in the center of the screen as shown. Type your answer like this: x=# y=# (replace the #s with the appropriate values)

(a)  

Which statement(s) are true about sequential vs event driven programming?

• Event driven programs run the same way every time.

• In event driven programs, some statements could be triggered by a mouse click.

• In sequential programs, the statements run in order from top to bottom.

• Sequential programs require user interaction.