Yammer interview questions

I was contacted by a recruiter and then invited on location. Recruiter himself was a contractor, I was offered free lunch, and met with two teams. The recruiter at some point told me they have run out of budget for hiring and then called me back after around a month and said now they can hire again.

Application: I submitted my resume online in the early October, and I received the phone interview invitation with other data scientist in the end of October (about 3 weeks). Interview Process: The HR was very friendly and efficient, and had scheduled my first technical phone interview with one data analyst. My first interviewer was very friendly and nice. We had a great conversation. During the interview, this interviewer asked me one probability question, and then some hypothesized questions. These questions are not hard, just need to practice it. Five days after my first phone interview, I got another invitation for my second phone interview. This time, the interview question itself was also not hard, however, I cannot understand the interviewer's questions most of time. Both of us are not native English speaker, therefore, I had to ask the interviewer several times to repeat these questions.