Design problem with Session

Hi everybody :
i am workin in a system . Let me give u an example . there is a student and a admin . they have different level of access to them system . A student can take the test . A admin can delete edit or add student record. Okay .
So when a student logs is details are taken from the database and stored in the session as UserBean . When the studend is takin the exam how can not allow the Admin not to delete the student from the database???
is there anything i can do like Can i add a the Users who log in in a different Bean of scope Application . If this is a good way then how can i add the Bean in Application scope in a Servlet
pls help me here
i am stuck
Thank you
Siva

Storing the student data in both the session and the database, where the database may be modified by the instructor sounds like a recipe for disaster. In my courseware, there is only one copy of the student data and it has synchronized access. Both the student and instructor Threads access the same copy of the data - every now and then this copy is backed up to a disk file.
Bill

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