Groupon Software Development Engineer interview questions

Applied online. Contacted by Manager. Received a coding question and a questionaire. Coding question was average. Received a call for scheduling phone interview. Phone interview was 3 one line question-answer( Given a program find its output.etc.) and then came the coding question, simple string manipulation question..nothing very difficult. I did well on the coding question. The interviewer seemed to be disinterested,very unfriendly and unhelpful; did not ask any questions while coding, showed his disinterest by not talking or just simply throwing an answer (for the sake of it) whenever I asked any question. Got a rejection email within 15 mins after the call..

2 telephonic interviews followed by 2 f2f interviews. Most of them on DS and Algorithms. Not too easy not too difficult. Technical discussion took place in the 2nd f2f interview.