Multiple choice

Which of the following is a minimum error code?

  1. Binary code.

  2. Gray code.

  3. Excess-3 code.

  4. Octal code.

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Gray code is a minimum error code (or unit distance code) because only one bit changes when moving from one number to the next, which minimizes errors in mechanical or electronic transitions.