.QB File Extension
What is a QB file?
Question file used by Wimba Diploma, a program used to create exam questions; contains questions referenced by exams; includes the question type, such as essay, multiple choice, and true/false; also stores location information that orders how the questions appear in the bank.
To add questions to your Question Bank, or QB file, select Question → New Question from an existing exam or the Question Bank window. Then, choose the question format, location, and quantity of questions, and click OK. Now double-click the new question (this opens the Question Editor), edit the question, and close the Question Editor window.
NOTE: When Wimba was purchased by Blackboard in 2010, development of Diploma ceased.