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Open its course - Design Patterns
Software Engineering Principles By Mukhtiar Zamin
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  1. GoF Principles
    1. Favor composition over inheritance
    2. Program to an interface rather its implementation
  2. GRASP
    1. Information Expert: Class has the information to fulfill its responsibilities 
    2. Creator 
    3. Controller: Which object will receive and coordinate system operations 
    4. Low Coupling: Reduce impact of change 
    5. High Cohesion: Keep object focused, understandable and manageable to support low coupling 
    6. Polymorphism 
    7. Pure Fabrication: Assign a highly cohesive set of responsibilities to an artificial class that does not represent a problem domain concept to support high cohesion low coupling and reuse. 
    8. Indirection: Avoid direct coupling and assign responsibilities to an intermediate object 
    9. Protected Variations: Identify point of predicted variation or instability assign responsibilities to create a stable interface around them
  3. SOLID
    1. Single-responsibility principle
    2. Open–Closed Principle
    3. Liskov substitution principle
    4. Interface segregation principle
    5. Dependency Injection (DI) / Inversion of Control (IoC) principle
  4. More are coming soon...


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  • On first evaluation you get 100% marks on correct answer, then on 2nd you get 95% marks and so on.
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