The best way to prevent questions from being disruptive is to use pair programming or mob programming. With pairing, one person answers the question while the other keeps thinking about the problem at hand. When the interruption is over, a quick “Where were we?” gets things moving again. With mobbing, interruptions are even less of an issue; they tend not to happen in the first place, because everyone’s working together. When they do, the person being interrupted just steps away while the rest of the mob keeps working.
