LLD - Behavioral Design Patterns — Part 2
Which syntax correctly represents the Observer pattern to solve communication?
Which syntax correctly represents the Observer pattern to solve communication?
easy🧠 Conceptual Q3 of Q15
Step-by-Step Solution
Solution:
Step 1: Recall Observer pattern basics
Observer pattern involves Subject notifying Observers on state changes.Step 2: Identify correct interaction
Notification is push-based; Observers react to changes without polling or direct modification.Final Answer:
Subject notifies observers when state changes -> Option BQuick Check:
Observer pattern syntax = B [OK]
Quick Trick: Observer pattern uses notifications, not polling or direct changes [OK]
Common Mistakes:
MISTAKES- Thinking observers modify subject directly
- Assuming no interaction exists
- Confusing polling with notification
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