hi i was just curious to know if the interviews start only after the application deadline or do candidates get called for interview even prior to the deadline,if they have sent their applications early.
Most schools work under rolling admision. That means "first come, first served". So yes, they'll start interviewing as soon as they get a decent amount of applications (or whenever they feel like it), regardless of when their deadline is.
I said this in some other thread, but the only school that I remember that does NOT works under rolling admision is UCLA, at least not for the 2004 app cycle. I don't know what their system was.