Answer: Python Puzzler #714

The answer is D. The program prints:

apple
What the program prints
Checked by running the program for real.

Why?

A negative position counts from the end: -1 is the last item, -2 the one before it. So -3 means item number 3 from the end.

Trace table

A trace table follows the program step by step. Here’s this one:

positionnegative positionitem
0-5pear
1-4melon
2-3apple
3-2banana
4-1plum

The code again

basket = ["pear", "melon", "apple", "banana", "plum"]
print(basket[-3])

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