teams interview with hr and they are asking my expectations, they are very kind to me and makin me encourage. Asked me salary expectations. they wants to learn some little details

I had two interviews, one just by the HR, asking me regular questions about the VISA and my availability. The HR was really helpful and was giving constructuive comments for preparation for the technical interview. Then I had another technical interview, which was a really long one. it took almost 1:30 h on phone, asking the most technical questions one might imagine. Three people were asking questions as if I am doing my PhD qualifying exam, even harder :)