One of the most common dreams is failing an exam. In the dream one is not prepared for the exam. In a variation, one is onstage and doesn’t know the lines. Both situations refer to a fear of failing in public.
The dreamer should examine his self-esteem. In the exam situation, usually the subject—or question one doesn’t know how to answer—gives an indication of the field in which one feels insecure. Onstage, the play or scene is sometimes a key to the field of fear.