Answer: Python Puzzler #838

The answer is A. The program prints:

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

Why?

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

Trace table

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

positionnegative positionitem
0-4melon
1-3mango
2-2banana
3-1apple

The code again

basket = ["melon", "mango", "banana", "apple"]
print(basket[0])

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