Answer: Python Puzzler #2657

The answer is D. The program prints:

mango

This answer was 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 -2 means item number 2 from the end.

Trace table

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

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

The code again

basket = ["melon", "apple", "plum", "mango", "banana"]
print(basket[-2])

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