In my assigment is:
It must allow the user to book a selected record, updating the database file accordingly.
Sorry,English is not my born language, as you noticed
So, can any one explain we, what the hell the Sun want to me in this "must" requirement?
Does it mean, that:
1) I have to implement usecase "book record", which locks given record and unlock will be made in the end of the usecase update,delete or calling unlock usecase
2) The lock/unlock mechanism should be implement as a part of usecases update or delete?