The data flow diagram for an ATM system outlines the process of user interaction with the bank server. Users insert their card, enter their PIN, and select a transaction. The bank server verifies the login and approves or denies the transaction. The ATM system updates transaction logs, dispenses cash, and prints receipts. This DFD shows how important it is to have secure communication between the user and the bank server. This keeps financial transactions safe. It highlights how the database keeps accurate transaction records. This ensures a reliable service for users.
