These old exams are provided as a courtesy and convenience for you. They do not necessarily represent a single semester, the same content, or the version of the textbook you are currently using, but are here to give you some idea of the types of questions and level of detail you may expect on your tests. You will have to provide your own answers to questions. My suggestion on how to use these:
Study hard. Take the appropriate questions on the old exam. Score your grade. If you did not do well, you haven't studied enough. Get back to work! An exam is an assessment tool--use it to assess your proficiency with the material, not to try to figure out which material to study!
Good luck with your studying!