Candidates were first shortlisted on basis of GPA criteria (7.0 ogpa till 6th sem).

Technical interview:
what are your areas of interest ?
then related questions followed.
what you did in your summer internship project?
questions in CDM, that was part of my summer internship project and also they asked the implementation of CDM project in ONGC and how the CDM process is carried out?
i think at that point they were impressed and the interview ended.

it was mainly a technical interview with a 1-2 HR questions like rank in IIT jee entrance exam and why did you choose Environmental Engg. as a branch? (was it a choice or compromise?).

do's:
1. always make a through study of company and its ongoing projects regarding your branch.
2. always do your 3rd year summer project sincerely and somehow relate you work can be useful to them (give fundas, kuch bhi karoon)
3.show how you can be beneficial to the company (sell yourself)
4. stay confident and have faith in yourself.

dont's:
1. never argue with an interviewer (may hurt his ego)
2. dont ever say anything about your further studies plan.
3. dont ever sit in a interview with the intentions of not joining the company even after selection (kabhi select hi nahi hoge yeh done hai)

Candidates were first shortlisted on basis of GPA criteria (7.0 ogpa till 6th sem).
Then there was only one interview with a panel of about 6-8 people.
The final number of applicants were 11 in number, out of which 4 were selected and i was 3rd among the ones selected.
i guess my project work and i was able to relate it to its application in ONGC. i mean they saw some usefulness in taking me and the confidence level was good. Some luck is always on the day when you get selected