Which design pattern defines one-to-many dependency among objects ?
Correct answer: C. Observer pattern
- A. Singleton pattern
- B. Facade Pattern
- C. Observer pattern
- D. Factory method pattern
Explanation
The Observer pattern creates a one-to-many relationship in which one subject notifies multiple dependent observers when its state changes. Singleton and Factory Method address creation, while Facade simplifies access to a subsystem.
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