online examination system

“ Design a ruby on rails application "Online examination" which would have two types of users admin and examinee. The admin should have the ability to add a new question set and questions, along with options and answer to [login to view URL] each question set a time duration should be given, also the number of question for attempt should be [login to view URL] question should have the difficulty levels('easy','medium','difficult') as [login to view URL] the admin can activate and deactivate a question set,as well as a question.A deactivated question set can be edited. The admin should also have the ability to see list of examinee for a given date and see the question set(s) chosen by them to give the exam and the total score for [login to view URL] have the ability to print the list so generated. The examinee should have the ability to sign up, should be able to see list of question set as per the level of experience given while signing up(fresher,intermediate,experienced),which are [login to view URL] a question set and start the [login to view URL] examinee should be able to mark a option as answer for each question and it should be [login to view URL] the time duration for the selected question set is finished, the question set should be auto-submitted and no more changes on the same question set should be allowed.A examinee can attempt more than 1 question set. "