A half byte is known as ________.

A byte is the standard unit used to represent one character of data and is made up of 8 bits. Splitting a byte exactly in half gives a group of 4 bits.

This 4-bit group has its own specific name in computer studies, the nibble. A nibble is large enough to represent a single hexadecimal digit (0 to F), which is why it is a useful unit in low-level computing and digital electronics. Data is a general term for any facts processed by a computer, and bit refers to a single binary digit, not a group of 4, so neither term fits the specific half-byte grouping being asked about.

Exam takeaway: memorise the chain of data units: 1 bit is the smallest unit, 4 bits make a nibble, and 8 bits (2 nibbles) make a byte.