Visa Inc. Senior Software Developer interview questions

The interview consists of 1 telephonic round and 2 F2F technical rounds.The question were all on algorithms. Although the work was on spring and hibernate and was all support work with minor enhancements. What i did not like was the interviewers were very badly behaving and when i was struck with any answer they started to laugh. This was very unprofessional of them. Although i got the offer but i rejected the offer.The Company should first respect people and then ask them to come for interview.