For how many days do the interviews continue?

Hello Guyz, does anyone know whether Ernst and Young conducts their interviews over the course of only a single day or do they conduct it for quite a number of days?

I am asking coz my friend, who scored less number of marks than me, and even copied my whole CV got a call for interview tomorrow, whereas I havent recieved a call from E&Y. I even mailed them before he did.

Is there any possibility I might still receive a call?