The answer is D. The program prints:
roar
This answer was checked by running the program for real.
Why?
A dictionary stores pairs: a key and its value. sounds["lion"] looks up the key ‘lion’ and gives back its value.
Trace table
A trace table follows the program step by step. Here’s this one:
| key | value |
|---|---|
| frog | ribbit |
| lion | roar |
| owl | hoot |
| mouse | squeak |
The code again
sounds = {
"frog": "ribbit",
"lion": "roar",
"owl": "hoot",
"mouse": "squeak",
}
print(sounds["lion"])Try it: change one number in the program and predict the new output before you run it.