The answer is D. The program prints:
baa
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 |
|---|---|
| sheep | baa |
| owl | hoot |
| frog | ribbit |
| duck | quack |
The code again
sounds = {
"sheep": "baa",
"owl": "hoot",
"frog": "ribbit",
"duck": "quack",
}
print(sounds["sheep"])Try it: change one number in the program and predict the new output before you run it.