Firstly, there was phone interview which is taken by HR. Further I was called for in-person interview taken by three guys. Took almost an hour for the whole interview including technical quiz.

Very unprofessional interview. Upon passing the technical interview I had a conversation with a manager who said they were looking for someone to start right away (I had listed on my resume I was not graduating for a few months and was currently at an internship for that time). It's like they didn't even bother to look at my availability. Wasted my time. Told me to "Call HR if anything changes".