hello,
This is mark from Delhi, I am working as senior web developer in a software company. I have developed so many big portals like business to business (B2B) , business to customer (B2C) , job portals , social networking , vendor buyer concepts ,tour and travels etc..
in case of your project i will provide you strong backend panel from where after login you can manage questions and answers easily , in this section you can activate , deactivate , delete , add , edit any question and answer. because there are so many questions you have in tutorial so this is difficult to add questions manually. so i provide a option for bulk uploading using excel sheet so that you can post whole data to site at once. in front end there should be login for member and after login member of site and read tutorial category wise.