Uncategorized Q139. Define REGISTER Variable. April 30, 2014 WFQ 0 Comments AUTOmatic Variable Q139. Define REGISTER Variable. Ans. A fast automatic variable that is stored inside a CPU register rather than in memory. Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on Google+ (Opens in new window)Like this:Like Loading... Related