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How can combining the Mediator and Observer patterns improve communication in a complex system?

hard📝 Trade-off Q8 of 15
LLD - Behavioral Design Patterns — Part 2
How can combining the Mediator and Observer patterns improve communication in a complex system?
AMediator and Observer both broadcast messages to all components
BMediator duplicates messages; Observer blocks communication
CMediator removes all observers; Observer replaces mediator
DMediator centralizes communication; Observer allows dynamic reactions to events
Step-by-Step Solution
Solution:

  1. Step 1: Understand Mediator's role

    Mediator centralizes and manages communication between components to reduce dependencies.

  2. Step 2: Understand Observer's role

    Observer allows components to react dynamically to events without tight coupling.

  3. Step 3: Combine benefits

    Using both patterns together centralizes communication and supports flexible event handling.

  4. Final Answer:

    Mediator centralizes communication; Observer allows dynamic reactions to events -> Option D

  5. Quick Check:

    Combined patterns improve communication = D [OK]
Quick Trick: Mediator manages flow; Observer reacts dynamically [OK]
Common Mistakes:
MISTAKES
  • Thinking mediator duplicates messages
  • Assuming observer blocks communication
  • Confusing roles of mediator and observer

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