It is helpful to study answers from previous exams. Studying the answers from previous exams allows the test takers to test their knowledge and learn what concepts they should focus on studying based on past test questions.
Reviewing previous exams also assists the test takers in improving their speed and mastery of the material on which they are being tested. It helps with designing a plan to answer said questions in the swiftest and most accurate manner as well. Utilizing previous exam questions for studying also exercises the test taker's retention and comprehension of the various topics that were formerly reviewed.