EXAMINATION..what is the hardest and the easiest type of test for you?

i find all test very challenging also there are types of exam that have level categories like easy,average,difficult depending on how the students answer the question one good example is the us-rn licensure,it made use of computer it level your knowledge and if you met the minimum level passing.the computer will stop but some situation if usually stop at 75 or above,the items is 265.if you met their passing you will pass and if not met you are failed.there are types of exams like paper exams others in computer.