Coaches will get questions about playing time from all angles. When working within a school setting the conversation gets trickier, because grades are also involved with sports. Most schools require at least a C average in order to continue to be part of a sports team, so if a student's grades keep dropping they may have to be pulled off the team or benched until their grades get better. This is a part of playing time you can't control.

What you can control is who is on the court when. To get everyone on 100% equal playing time is impossible. There are lots of different variables that come into play- related to position, level of player, injuries, how many players are on the team, etc.- trying to make everyone completely equal isn't going to happen. Ultimately the decision is yours who is on the field and who isn't. As a coach you want to give the team the best opportunity to succeed, sometimes that means some players aren't going to get the same amount of play. You can be honest with the interviewer about this, because that is a part of playing a sport- especially in upper grade levels.