[Solved] Which of the following is the correct way to define a Mediator interface in a low-level design? - Ans: interface Mediator { void notify(Component sender, String event); } | LLD

LLD - Behavioral Design Patterns — Part 2

Which of the following is the correct way to define a Mediator interface in a low-level design?

Ainterface Mediator { void notify(Component sender, String event); }

Bclass Mediator { void notifyAll(); }

Cinterface Mediator { void sendMessage(String message); }

Dclass Mediator { void receive(Component sender); }

Step-by-Step Solution

Solution:

Step 1: Identify typical Mediator method signature
The Mediator usually has a method to notify it about events from components, often with sender and event details.
Step 2: Match method signatures to this pattern
interface Mediator { void notify(Component sender, String event); } matches this pattern with notify(Component sender, String event). Others lack sender info or use incorrect method names.
Final Answer:
interface Mediator { void notify(Component sender, String event); } -> Option A
Quick Check:
Notify method with sender and event = B [OK]

Quick Trick: Mediator notify method includes sender and event [OK]

Common Mistakes:

MISTAKES

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Which of the following is the correct way to define a Mediator interface in a low-level design?