Answer: Python Puzzler #664

The answer is B. The program prints:

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

Why?

Python counts list positions from 0, so position 4 is the fifth item.

Trace table

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

positionnegative positionitem
0-5pear
1-4mango
2-3plum
3-2melon
4-1carrot

The code again

basket = ["pear", "mango", "plum", "melon", "carrot"]
print(basket[4])

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