Tech Mahindra interview questions

The hiring process includes one aptitude, a coding round and then was the interview round. The first two processes were done online on college campus and for the interview tech Mahindra called us to their office for me that was noida. Poor management led to the interview process to end till 7p.m evening and was started 10 a.m morning. So there were basically two interviews first was the technical and the other one was the HR round. For the technical interview the interviewer asked about the basic terminologies related to the subjects and skills i had mentioned on my resume and then a asked me brief explanation for the projects i have done during my college. For the coding questions a question for finding the smallest element in an array.

Tell me about yourself and technical questions will be followed and how do you retain old clients. Just a minute round that will be followed. How do you Manage to retain angry customers.