Answer: Python Puzzler #3449

The answer is B. The program prints:

baa

This answer was checked by running the program for real.

Why?

A dictionary stores pairs: a key and its value. sounds["sheep"] looks up the key ‘sheep’ and gives back its value.

Trace table

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

key	value
dog	woof
cat	meow
frog	ribbit
sheep	baa

The code again

sounds = {
    "dog": "woof",
    "cat": "meow",
    "frog": "ribbit",
    "sheep": "baa",
}
print(sounds["sheep"])