Python L27 Etch A Sketch

What is the main purpose of screen.listen() in turtle programs?

• Moves the turtle automatically

• Starts detecting keyboard input

• Changes the background color

• Resets the screen

What happens if you don’t call listen() before using onkey()?

• The turtle will move randomly

• The program crashes

• Key presses won’t trigger any functions

• The turtle ignores all commands

How is onkey() correctly used to bind a function to a key?

• onkey(go_up(), "Up")

• onkey("Up", go_up)

• screen.onkey(go_up, "Up")

• screen.listen(go_up, "Up")

In event-driven programming, the code waits for the user to trigger events like pressing keys.

• True

• False

onkey() will only work if parentheses are included (e.g., onkey(go_up(), "Up")).

• True

• False

Match each key with its correct turtle command behavior.

• W

• Move forward

• A

• Move down

• D

• Move right

• S

• Move left

The function that enables the screen to start waiting for key presses is​ (a)   .

• listen()
• home()
• circle()
• onkey()

In the code screen.onkey(change_color, "1"), "1" represents the ​ (a)   .

• key
• function

Is It Sequential or Event-Driven?

Groups:

(a) Sequential

,

(b) Event-Driven

• screen.onkey(move_forward, "w")

• print("Hello")

• screen.listen()

• screen.onkey()

• tom.forward(100)

Explain the main difference between sequential and event-driven programming.