Capgemini Engineering interview questions

I was asked to attend a telephonic interview on Saturday evening 5: 00 PM. All of a sudden in the morning the interview was rescheduled and the communication was really unprofessional. Attended the telephonic interview and the big thing stars here. Interviewer is very unprofessional, called me late by 15 minutes. Through out the interview there is a lot of background noise. Midway through the interview, interviewer came up with his own assumptions on how I am taking the telephonic interview. That is the time I lost focus and interest in the interview. I have never seen such an etiquette less, unprofessional and idiotic interviewer. He expected me to come with a solution before he completes his question, if I do not then he assumes that I am googling and telling the answers. This is the first time I felt companies should train their employees on how to behave with the interview attendees. Will never refer this company to any one.