the total process took more than a month and still it is not completed,
i went in for a Walk-in interview at ernst & young bangalore -india, it took some 5 or 6 hours total, there were around 100 people, most of the candidates were really competitive, and were filtered through GD, english language test, aptitude test and accounting test.
These tests were the toughest yet i have faced, because of the difficulty of question and more importantly the strict adherence to time limits by hr people.