Main entities and output of First Level DFD (1st Level DFD): You will highlight the main functionalities of Hospital. DFD Level 1 provides a more detailed breakout of pieces of the 1st level DFD. It also identifies internal data stores of Doctor Fees, Test, Medicine, Doctor, Patient that must be present in order for the Hospital system to do its job, and shows the flow of data between the various parts of Hospital, Patient, Test, Doctor Fees, Medicine of the system.
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