)written test(technical + aptitude)(45 mins per paper)
technical- general science + sprinkled with some electronics questions
aptitude- very easy. mostly calculation based.
shortlisted 40% of applicants

3 topics were given for discussion. the process lasted for about 45 mins
shortlisted 35 % of gd candidates for interview

no shortlisting. hr person clearly specified that selection would be purely on the basis of performance in selection procedure

technical- tcr bit functioning, function of offset

interview was hr mostly(my interview was very short as compared to others. lasted for 7-8 mins)
hr- wanted to know why i was so stubborn in the gd.
discussed in detail.
discussed about weakneses

be confident throughout the process
try to speak consistently in gd and try to start a discussion rather than a fight. giving a direction to gd will be well appreciated by the hr people. in interview most people had been grilled on how would they cope in the tough work environments in which the employees have to work in.so prepare this answer very well as you would have to convince them pretty well that this kind of job is meant for you.
be very frank with the interviewer, but don't try to act smart.

knowledge of topics in gd and confidence.
good gpa may have been a minor factor