I applied in-person. The process took 1 day. I interviewed at Firstsource Solutions (Chennai) in Jun 2012
Interview
There was only one round of interview for me, i.e personal interview. They asked me to tell about myself, I did so with which they were satisfied as I am good in my Communication in English. People with less communication skills must go to a good English-Class and learn proper english before applying to such a reputed BPO.