Should exams be removed from high schools?

Today was my last day of exams for the semester! This is a very controversial topic. A lot of people believe that exams do not accurately reflect a person's understanding of the subject (due to the time time crunch, pressure, stress, etc), while others believe that those factors are necessary to demonstrate the student's understanding of the material. Personally, I believe that it depends on the style of the exam. Some exams seem very out of line, while others are alright.