Answer: Python Puzzler #2958

The answer is B. The program prints:

boop!beep!pong

This answer was checked by running the program for real.

Why?

join glues the items of a list together, putting ‘!’ between each pair.

The code again

sounds = ["boop", "beep", "pong"]
print("!".join(sounds))

Try it: change one number in the program and predict the new output before you run it.