Answer: Python Puzzler #1113

The answer is D. The program prints:

[35, 29, 23, 1]
What the program prints
Checked by running the program for real.

Why?

sort() puts the list in order, smallest first. reverse=True flips it, so the biggest comes first. It changes the list itself.

The code again

scores = [35, 29, 1, 23]
scores.sort(reverse=True)
print(scores)

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