The exams are available in three different formats: PDF, Postscript and HTML. If you are planning to print the exams and you know how to deal with Postscript or PDF documents, I recommend that you take advantage of that. In some cases the HTML version of the exam isn't very readable.
Keep in mind that topics covered from semester to semester may vary. Also, topics can be covered in different orders so you may have to look at several exams to find relevant questions.