operation DeleleQuestions is 
	inputs: ID*, QuesitionBank;
	outputs: QuestionBank;
	description: (*This operation deles questions from the QuestionBank.  It return a QuestionBank without the deleted  
                                 questions in it*);
                                 
end DeleteQuestions;


operation UploadQuestions is
	inputs: ID*, LocalQuestionBank, SharedQuestionBank;
	outputs: SharedQuestionBank;
	description: (*This operation uploads questions from the shared QuestionBank to the local QuestionBank; after 
			the operation the shared question bank will now contain the new questions*);
end UploadQuestions;


operation DownloadQuestions is
	inputs: ID*, LocalQuestionBank, SharedQuestionBank;
	outputs: LocalQuestionBank;
	description: (*This operation downloads questions from the local QuestionBank to the shared QuestionBank, after
			this operation is performed the local question bank will contain the new questions*);
end DownloadQuestions;

operation FilterQuestions is 
	inputs: QuestionBank, Filter*;
	outputs: QuestionBank;
	description: (* Arranges the questions in the QuestionBank based on the filter attribute that the user chooses to 			         display on top*);
end FilterQuestions;