Studierende stehen vor dem LC und blicken lächelnd einer Kollegin mit einer Mappe in der Hand nach.

Exercise No. 29: Start an auction

Partial Solution 1

a) A customer wants to start an auction. Therefore, he must log in the auction system with his username and his password. If the login was incorrect, the system verifies how often this was the case. If one or two times wrong - the customer can log in again. If he entered a wrong combination three times, the system blocks the login for half an hour.