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Explain about the E-R Diagram
Entity-relationship (E-R) diagram is detailed logical representation of data for an organisation. It is data oriented model of a system while DFD is a process oriented model. ER diagram represent data at rest whereas DFD tracks the motion of data.
ERD doesn't provide any information regarding functionality of data. It has 3 main components - data entities, their relationships and their associated attributes.
Question: (a) Briefly explain the following concepts: (i) Encapsulation and its advantages (ii) Abstract class and its use (iii) Polymorphism and its advantages (b)
Discuss the design steps of the transform mapping. Re-examine the fundamental model. Re-examine and refine the DFD for the software. Determine the DFD has either the
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What are the elements of design model? i. Data design ii. Architectural design iii. Interface design iv. Component-level design
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