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Explain the waterfall model.
Waterfall Model:
The waterfall model is a sequential software development model, in which progress is seen as flowing steadily downwards (such as waterfall) by the phases of Conception, Initiation, analysis, design (validation), Construction, testing and maintenance.
Data Flow Diagrams (DFD) It's a graphical representation of flow of data through a system. It pictures a system like a network of functional processes. The foundation of DFD i
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