The interview started with a formal question, the interviewer asked about my details and later in the behavioral round the interviewer asked about specific details in the resume and I could not go to the technical round and I don't know what mistake I did.

It was very conversational, I just chat with the recruiter during the career fair at my school and he extended a verbal offer on site. I was not aware of the offer until later contacted by another recruiter.

I was called on the phone number that I had provided in my application and asked a few screening questions to determine whether or not they would be interested in moving forward with me as a candidate. The recruiter who called me was very polite and understanding. The questions that I was asked were quite straightforward and the overall experience was nice and the call lasted for about 25 minutes.