For example, we make a complete subject test for Science. Four question Banks Physics, Math, Chemistry and Biology are organized. From each Bank we take 25 questions into a quiz. One quiz gives one report for evaluation. But, we like to see in which subject bank, a student how much scores! Therefore, an evaluator will understand if a student is good in mathematics, or chemistry, or weaker in Physics, or in Biology. How to solve this problem?
I'm afraid this question is related to the Quiz module, not the Questionnaire module. Please re-post your question to the relevant Quiz module forum.