Following Diagram specifies structure of managing your question bank in the online examination system.

Subject : It is top level entity. If you are considering to import English Language Question bank then top level entity subject could be Named as English. Please refer step to create Subject in the System
Topic: Each Subject can have one or more topics associated with it. If you have entered top level entity subject as English then its topic could be Reading Comprehension , Tense, Grammar, Synonyms etc. Please refer Step to Create Topics in the System