Sopra Steria Module Leader interview questions

1. What is Abstraction? 2. Difference between Static and Instance Constructor

They focused on nodejs in deep. Design patterns in node, situation based questions. DB queries like "update table where column is status have values 0 and 1 and reciprocate these values. I said query would be like "update table set status = 1-status". but he was expecting something else. questions on API calls. Saw arrogance on technical guy, but project manager was good.