Answer: Python Puzzler #695

The answer is B. The program prints:

mango
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
0-4mango
1-3grape
2-2apple
3-1plum

The code again

basket = ["mango", "grape", "apple", "plum"]
print(basket[0])

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