Hi ive got this horrible example exam question to revise and i have no idea really about any of this has anyone got any ideas:

Session management presents significant problems in database-driven web-based applications, as has been illustrated by widely publicised cases where users have been able to view the account information of other users.

Produce a set of guidelines for the effective implementation of session management. Your answer should include critically evaluations of the following session management mechanisms:
¨ Cookies
¨ URL modification
¨ Hidden fields
¨ Session variables

Thankyou
Charlie