as mary said , no way to prevent student copy questions , but you can work around,
say you have 5 topics in your course and want a 100 question ( 20 for each )
make a 40 - 60 per each topic in a q bank categories( category for each topic)
then make an exam that you add 20 random q from each cartegory ( better than make a 300 quuestion bank for the whole course)
so you get 100 question exam every 20 is from a category contain 30-50 question
each student will get a different version of yhe exam ( about only 60 % is common)
also if it the final exam , no need for feed back (modify the Review options than only he see nothing)
say you have 5 topics in your course and want a 100 question ( 20 for each )
make a 40 - 60 per each topic in a q bank categories( category for each topic)
then make an exam that you add 20 random q from each cartegory ( better than make a 300 quuestion bank for the whole course)
so you get 100 question exam every 20 is from a category contain 30-50 question
each student will get a different version of yhe exam ( about only 60 % is common)
also if it the final exam , no need for feed back (modify the Review options than only he see nothing)