A question which asks you to illustrate usually requires you to explain or clarify your answer to the problem by presenting a figure, picture, diagram, or concrete example. An interpretation question is similar to one requiring explanation. You are expected to translate, exemplify, solve, or comment upon the subject and usually to give your judgment or reaction to the problem. When you are instructed to justify your answer you must prove or show grounds for decisions. In such an answer, evidence should be presented in convincing form.
Listing is similar to enumeration.
You are expected in such questions to present an itemized series or tabulation. Such answers should always be given in concise form. An outline answer is organized description. You should give main points and essential supplementary materials, omitting minor details, and present the information in a systematic arrangement or classification. A question which requires proof is one which demands confirmation or verification.