Digital describes

• A. A continuous signal that changes without fixed steps
• B. A cyclic data structure
• C. A color space in imaging
• D. Data or signals represented by a finite number of values

Answer: (D)

Digital describes data or signals that are represented by a finite number of values. This means information is quantized into discrete steps rather than flowing smoothly. In practice, digital systems break the world into a limited set of symbols or levels, like 0 and 1 or a small set of brightness or color levels. Because there are only a finite number of states, it’s easier to store, transmit, and process information with reliable, repeatable results. This is different from an analog or continuous signal, which can take any value within a range. The other options describe different ideas (data organization, color mapping, or continuous signals) that aren’t defining what digital means.