Tech Mahindra interview questions

There were 7 questions and all were analytical except one (Most were based on real time scenarios). The interviewer had lot of experience and knowledge, but while giving the scenario, he did not give his complete requirement. Had to answer the questions, by taking assumptions on what his question could be like. I was close to his answers, but it looked like he was expecting specific answer (pin-pointed). Not sure how he could have expected this without complete requirement. Moreover, as these are analytical questions, decision can't be taken in just 5-6 minutes. One can only have an approach to the problem. The interviewer also gave me the answer on what exactly he was looking in my answers, but I am very much sure, that it would fulfill his specific scenario, but in a real time problem, it might be difficult to implement the same in the real world as it might impact several other usecase. I did not argue with the interviewer as it is not worth doing that. I thanked the interviewer asked his name and left.