It all goes back to the pirates' "pieces of eight" which referred to the Spanish dollar which was worth eight reils. The Spanish dollar was legal tender in the US until the mid-1800's. At the same time the American dollar was equivalent to 4 quarters. Change for a dollar was often made by breaking or cutting the Spanish dollar into its eight pieces or "bits". By simple math 1 quarter was worth two pieces of eight or two bits. Two bits was 50 cents, six were 75 cents.
I think you mean "two bits" like the litte song, "Shave and a haircut, two bits." Two bits is a quarter, twenty five cents.
A group of four bits is known as a nibble.
One nibble, or nybble, is equal to four bits.
A 'bit' is 1/8 of a dollar or about 12 cents. Two 'bits' is about a quarter.
twenty-five cents; smilarly, "four bits" is fifty cents
50
Four bytes represent 32 bits. 32 bits represent 4,294,967,296 possibilities.
There are 8192 bits in a kilobyte.
If you are asking what is four (4) in the binary system, the answer is 100.
This depends upon the language. In some languages the first bits may represent an address or label. Most assembly languages the first byte or two is an op code. Four bits is pretty small for an address--that is only half a byte. Four bits on the Intel 4004 chip represent a "word."
$1
its called a Nibble