Tough....but very methodical...step by step interview process with highly knowledgeable people interviewing you at any given time. The interview started off with the interviewer asking me about my background and then progressively delving into my experience with design architecture etc. The interview also focussed on my ability to see the big picture and look at things objectively as well as subjectively. All in. All a very well conducted interview I am awaiting the further rounds of interview from guys fromUS and the actual on campus round.