Providence Software Developer interview questions

They are not professional at all. They just rejected me because they were not interested in my machine learning project. They just want some backend project. The interviewer was not even listening to me while doing the interview, he was busy checking his email.

Phone screen, took about 1 hr. (Contract role) Began with general discussion about the project(s), asked questions about existing infrastructure. Notable questions: What were some mistakes I made, that broke something What was the most challenging project I worked on