What do the numbers 0s and 1s actually represent inside a computer?

Binary.

Explanation:

Binary, the off and on, Is how computers think.

You think code is Function(Os,35,Export) and stuff like that? Thats trillions of binary lines to make that. Binary is the very fabric of code. modern code engines are very organized binary to make predefined functions so your brain doesnt have to manually think of quadrillions of off and on switches for each function you assign.

1. b

2. c

3. b

4. a

5. b