Whether from the examiner's point of view or from the learner's point of view, the effect test is only to test the learner's learning level, so as to better formulate subsequent teaching or learning strategies. Typical effect exams include classroom exams, mid-term exams and final exams. The core purpose of the qualification examination is to give candidates a fair chance to compete in order to obtain a higher level of study or workbench qualification. But to some extent, learners who can learn but can't take the exam often lose to those who can't learn but will take the exam, because the former just can't play their own learning level in the examination room.