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Module 3: Software Design & Metrics

20227m

Discuss the differences between object-oriented and function-oriented designs.

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Aspect Object-Oriented Function-Oriented
Focus Objects (data+functions) Functions/procedures, data flow
Decomposition Classes/objects Modules/functions (DFD)
Data Encapsulated with methods (hidden) Shared, global
Design notation UML (class, sequence) DFD, Structure chart
Reusability High (inheritance, polymorphism) Low, function reuse
Example language Java, C++ C, Pascal
Maintenance Easier (local change) Ripple effect (high coupling)

OO is data-centric, FO is action-centric. Modern systems often use hybrid.

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