Final answer:
The student is asking for a Level 0 Data Flow Diagram (DFD) for the real estate system in exercise G, chapter 4. Option 1, which focuses on the overall structure, is the correct choice. To draw the Level 0 DFD, start by identifying the main processes in the real estate system and depicting them as circles or rectangles connected by arrows to represent data flows.
Step-by-step explanation:
The student is asking for a Level 0 Data Flow Diagram (DFD) for the real estate system in exercise G, chapter 4. The DFD will depict the overall structure of the real estate system. This means that option 1, which focuses on the overall structure, is the correct choice. A Level 0 DFD shows the main processes involved in the system and the data flows between them. It does not include detailed data flows or hierarchy of processes.
To draw the Level 0 DFD, you can start by identifying the main processes in the real estate system. These could include processes such as 'Listing Property', 'Showing Property', 'Processing Offers', and 'Closing Transactions'.
Next, you can depict these processes as circles or rectangles and connect them with arrows to represent the flow of data between the processes. For example, the 'Listing Property' process may receive data from the 'Agent' and 'Seller' entities, and send data to the 'Database' and 'Marketing' entities.
Remember to keep the Level 0 DFD high-level and focus on the overall structure of the real estate system. If you need more details or examples, please provide the exercise G from chapter 4 of the book so that I can assist you further.