This online testing is for Medical students who want to take DES exam. They can try freely to improve they ability before the real exam come. one part of this test contains 100 questions which look exactly the same as the real exam. But please BE CAREFUL! Do not depending much on this test. Some contents might be error during construction of the test if you find any doubt, please check your document and leave some comment for us to enhancing the quality of this website. we also apologize in advance if any mistake happen in the contents of the question and answer. Thank you! Enjoy to try!