I applied online. The process took 7 months. I interviewed at GAIL (Noida) in Feb 2012
Interview
All India Written Exam usually held in the month of October, followed by Interview in the month of Jan- Feb
Interview questions [1]
Question 1
Technical questions are not very difficult. Primarily the Panel wants to adjudge whether you are able to blend in well, and are willing to work anywhere in India, as its work locations are scattered all throughout India