The exam is a relatively fair conversation.
Examination is like a written and relatively fair dialogue between candidates and teachers. If you don't know what to ask, answer irrelevant questions, or find another way to answer without your permission, in the teacher's opinion, whether you are willing to understand and accept your answers determines your score.
Judgment of personal subjective consciousness
People with a flamboyant personality may be on the high side when evaluating scores, while students with introverted inferiority may be relatively conservative when evaluating scores. Personal subjective judgment is often different from the teacher's relatively objective judgment, and it is difficult for us to realize it before and after answering the question.