LLD - Behavioral Design Patterns — Part 1
In the Observer pattern, what is the key responsibility of an Observer object?
In the Observer pattern, what is the key responsibility of an Observer object?
easy🧠 Conceptual Q1 of 15
Step-by-Step Solution
Solution:
Step 1: Understand Observer role
The Observer's main role is to get notified about changes in the Subject.Step 2: Analyze options
Only Receive updates from the Subject when its state changes correctly describes the Observer's responsibility to receive updates.Final Answer:
Receive updates from the Subject when its state changes -> Option BQuick Check:
Observer listens for changes [OK]
Quick Trick: Observer receives updates from Subject [OK]
Common Mistakes:
MISTAKES- Confusing Observer with Subject responsibilities
- Thinking Observer modifies Subject state
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