I applied through university. The process took 1 day. I interviewed at Tata Consultancy Services (Bhilai) in Dec 2013
Interview
The first round was an aptitude plus verbal communication round. The questions were easy. It was followed by Technical and then HR interview. In the technical interview they googled electronics and instrumentation viva questions and asked me.
Interview questions [2]
Question 1
http://www.instreng.com/community/threads/instrumentation-engineering-interview-questions-and-answers.576/
This is the link from where all the questions were asked