Tech Mahindra Research Associate interview questions

Walk in interview-first some questions related to JD(equity,capital etc) if HR thinks you have knowledge then case study then we waited for 6-7 hrs sitting idle.HR manager told after that he had some other work(?) so he said to come again tomorrow He was not ready to give details or talk.Full waste of time.There were some candidates from yesterdays batch also.so,in all lot of waste of time frustrating so i choose not to waste my time next day by going there