Such a joint concentration requires a thesis, and this thesis must incorporate both disciplines. Classes can be graded on the basis of exams, written assignments, programming assignments and final projects. Any particular courses may be graded on some combination of the above. Students can expect to do between 10 and 20 hours per week on work for a computer science class. Harvard University has public computers located in the science center, as well as around the campus.
Students can also do work on their own computers from their dorms, which are well wired.
Students often get summer jobs, both in the Cambridge area and elsewhere. Some students stay at Harvard and work as research assistants with faculty. All of the courses are taught by faculty. Teaching assistants run review sections and grade assignments. I have more questions.