Resmed Senior IOS Developer interview questions

Resume screening was done in 1 week. Then in First round the interviewer was from India and I was giving interview for Singapore. He was a (iOS Developer) in company from Ahmedabad location. Very First question asked by interviewer was are you giving interview for Bangalore location ? Weird right. As soon as I said Singapore his face gesture were not positive. 2nd thing this this guy was full of arrogance and egoistic person. Brother you are representing your company don't bring arrogance if someone is giving good answers. I'll give you example He asked me zip operator in combine I explained the definition including drawback of using it with different counts of array objects. This guy was not aware about it and again he made a weird face. Please update your knowledge otherwise learn from others no shame in that.