Question: a. Data flow diagrams incorporate four symbols. Identify those symbols and suggest how each might be applied in the Netcom case. b. Netcom would need

a. Data flow diagrams incorporate four symbols. Identify those symbols and suggest how each might be applied in the Netcom case.
b. Netcom would need to maintain a database of customer records; that database would likely include (at a minimum) a customer table and a subscription table. Create specifications (field names) for both tables, indicating primary keys by underlining and foreign keys with brackets.

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a Circles in a DFD denote processes if Netcom developed a leveled set of DFDs from the custom... View full answer

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