The memory of a computer is commonly expressed in terms of Kilobytes or Megabytes. A byte is made up of

In digital storage, memory is commonly expressed in bytes and their multiples (kilobytes, megabytes), and a byte is the fundamental unit comprising eight binary digits (bits) [1]. A bit is a binary digit that can be 0 or 1; grouping eight such bits yields 2^8 = 256 distinct values, which allows a single byte to represent one character or a range of numeric values [2]. Because a byte is defined by eight binary digits (not decimal digits), the correct choice is option 1. This eight-bit convention underpins common memory measurements and encoding schemes used in modern computer systems [2].

Sources

1. [1] https://www.sciencedirect.com/topics/computer-science/binary-equivalent
2. [2] https://www.geeksforgeeks.org/computer-science-fundamentals/understanding-file-sizes-bytes-kb-mb-gb-tb-pb-eb-zb-yb/