Kumon interview questions

In the store that I worked at, it was owned by a father and his daughter. In the almost two years I worked there, I haven't seen them post ads about any open positions. It seems that most of the times, people get in through connections. I was able to secure an interview through my friend who was already working there at the time. There, essentially, if you got an interview, you get the job. I have never met one person who got an interview but did not get a job. The interview seems to be a formality more than anything.