Q.What is the most important characteristic of gray code? Explain.

The gray code is a non-weighted, reflected binary code whose defining feature is that only one bit changes between any two successive code words. …

[!TLDR]

Gray code's key property is unit distance: only one bit differs between consecutive numbers, which greatly reduces read errors.

Gray code is a reflected binary code in which successive values are arranged so that each one differs from its neighbour in only a single bit position. This is called the unit-distance (or single-step) property. In ordinary binary, a transition such as 0111 → 1000 changes four bits at once; if the bits do not switch at exactly the same instant, a wrong intermediate value can momentarily appear. Gray code eliminates this hazard because only one bit ever changes at a time, so no spurious codes can be generated during a transition. …