I can't comment on IIT Hyderabad's MTech interview process, but I attended a summer school in IISc once in which I asked the professors what they look for in interviews to graduate school programmes. They said that the most important thing is to have strong fundamentals and ability to think from first principles. For example, a student told me that he appeared for the CDS interview at IISc. He told them that he is interested in ML and the questions they asked him were what is backprop, how does it work, can you derive it from scratch, what are SVMs, how do they work etc.
So basically, whatever you mention in the interview, make sure your fundamentals are clear in those subjects.
http://www.phd.cse.iitd.ac.in/preparingforphd.html You can use this as a general guide too - the same should apply for MTech admissions, even though this says PhD.