to eacn ?? these restricted questions, tren you can be sure to p ss, However, we do put a caveat on this approach. That is, we will not give any students assistance with the particular question examples listed here. For example, should a student come to one of us for DFD question, we will gladly do so, except that we will not do so for any of the three DFD questions listed here. help in solving a Part B (6 questions x 10 marks 60 marks) Each short answer question is worth 10 marks. This session we have restricted the DFD question to the following three (3). One of these will appear on the exam. We encourage you to prepare all three. Question.. (10 marks). What is the purpose of a DFD context diagram? How is it related to the concepts of 'scope' and boundary conditions'? Assume you are preparing a DFD to describe the process of creating, approving, and closing a mortgage loan by a mortgage broker. Should the broker be represented as an external agent or by one or more processes? Why? The following physical DFD models the process of grocery shopping-from the time you write down a shopping list until the time you store purchased groceries in your home. Construct a logical DFD to describe the same scenario. Try to develop a diagram that is equally valid as a logical description of the way you currently buy groceries and as a logical description of ways you might buy groceries without ever leaving your home. Physical Data Flow Diagram Customer Creates Shopping Shopping Groceries List Groceries CtomerGroceriesProcessesTotal Cashier Computes Total Cashier Groceries Stocks Payment Grocerles Payment Authorization Prices Bank