Align Technology Product Research Engineer interview questions

I applied online. I had a phone screening with the HR after two weeks and then with the manager after a week. The HR just asked a few behavioral questions, but the manager asked several technical questions.

Asked 60% behavioral questions and 40% technical questions. The overall conversation is relaxed and happy. However I did not get an offer for on site interview. Probably some of the behavioral questions I answered is not what the technical manager wanted.