What is a bit in computing?

• A. A unit of information that is either 0 or 1
• B. A tiny square in a digital image
• C. A data structure used in JavaScript
• D. A type of loop in programming

Answer: (A)

In computing, a bit is the smallest unit of information and it can represent either 0 or 1. This binary choice is the foundation of how computers store and process data—everything from numbers to letters to images is built by combining many bits. A group of eight bits forms a byte, and larger sequences of bits encode more complex information.

A pixel, the tiny square in a digital image, represents color at a point in an image, and it typically uses multiple bits to store its color values. A data structure in JavaScript, like an array or object, organizes and stores data in higher-level forms. A loop is a control structure that repeats a set of instructions. Each of these describes a different concept, while a bit specifically refers to that single binary unit of information.