Answer: Python Puzzler #723

The answer is C. The program prints:

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

Why?

Python counts list positions from 0, so position 3 is the fourth item.

Trace table

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

positionnegative positionitem
0-5plum
1-4mango
2-3grape
3-2carrot
4-1apple

The code again

basket = ["plum", "mango", "grape", "carrot", "apple"]
print(basket[3])

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