The answer is B. 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 |
|---|---|
| lion | roar |
| sheep | baa |
| owl | hoot |
| cat | meow |
The code again
sounds = {
"lion": "roar",
"sheep": "baa",
"owl": "hoot",
"cat": "meow",
}
print(sounds["lion"])Try it: change one number in the program and predict the new output before you run it.