LLD - Design — Chess Game
Which of the following is the correct way to register an observer in the Observer pattern?
Which of the following is the correct way to register an observer in the Observer pattern?
easy🧠 Conceptual Q12 of Q15
Step-by-Step Solution
Solution:
Step 1: Identify who registers whom
In the Observer pattern, the subject keeps track of observers.Step 2: Choose correct method call
The subject callsaddObserverto register an observer, matching subject.addObserver(observer).Final Answer:
subject.addObserver(observer) -> Option AQuick Check:
Subject registers observers = addObserver [OK]
Quick Trick: Subject manages observers, so use subject.addObserver() [OK]
Common Mistakes:
MISTAKES- Trying to register subject on observer
- Using wrong method names
- Confusing roles of subject and observer
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