What are university exams like for Sociology or Social Anthropology??

I have been accepted to the University of Manchester for their Sociology and Social Anthropology course which I am really excited about. However, it is 90% exam based which I am worried about. I am not bad at essays and exams but I wouldn't be the best at them. Has anybody here done a related degree programme or is currently doing one and has taken any exams. If you have, how hard are they? I want to go to Manchester but I am scared of failing because there is so many exams involved.