it is A the hardware im pretty sure but dont put my answer in im not completley sure
It would help if there is a programming language in the context of which you need this answered. For instance in Python you can create a program like this:
print(type("Hello"))
print(type(1337))
print(type(True))
print(type("3.14"))
It will return:
<class 'str'>
<class 'int'>
<class 'bool'>
<class 'str'>
We use 0 to represent "off" and 1 to represent "on". Each one of the switches is a bit. A computer is called a "64-bit" computer if its registers are 64-bits long (loosely speaking). Eight switches in a row is a byte.