I have done interview for the third time (for the same position in the same university) and i was told that i passed for the first two interviews and im waiting the result of the third...surprisingly they gave me a home work and i have submitted on time.... all the three interviews i made, looked hopeful.... the problem is i didn't hear from them for two weeks.. and im starting to frustrate....is there any possibility that i might not get accepted ( i mean after all these three interviews and a homework)?

P.s I think we had good time during the interview... the third interview took two hours and it was more or less smooth.