Three rounds: aptitude, technical and hr interview. Aptitude round was easy. It is mainly tests your ability to solve in limited time. I you clear that round, then you should write an essay about a picture shown. Its basically computer checked. So, just make sure you use proper and simple grammar. Don't use complex sentences as it is read by a computer. Then if you clear that you will attend a Technical interview followed by a HR interview.

First round was a written test about General Aptitude Math Verbal Its quite easy to pass. Second round was about my resume and OOD. Not a tough interview. But here is the kicker. Tech mahindra recruited in batches. Meaning I knew a few people who got the offer when I was interviewing. After my interview was done. It took them 4 weeks to get back to me. When I emailed them multiple times and called them the HR either dint pick up the call or would tell me that they are deciding on a "start date". The ultimately sent me a reject email. Which is fine but the people who had already got the offer before me like I mentioned earlier also got their offer revoked. Tech M ultimately hired no one. My suggestion is even if they call you dont go for this company. It has very lazy people and pay you very less and the work they do can be done by yourself at home. You are better off applying for more companies than join this one.