It depends on your teachers. Some teachers have very easy finals, where others are more difficult. Also, depending on the teacher and/or class, the final may be cumulative. That means that you'll be tested on everything you learned throughout the semester. However, it could also be that you're just tested on the material from the midterm point until the final.
So there really is no specific answer as it can vary from teacher or class. If you take good notes, study effectively, and get help when you need it, you shouldn't have much problem.