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What is the main purpose of the Chain of Responsibility pattern in system design?

easy🧠 Conceptual Q11 of 15
LLD - Behavioral Design Patterns — Part 1
What is the main purpose of the Chain of Responsibility pattern in system design?
ATo pass a request along a chain of handlers until one handles it
BTo create multiple copies of an object
CTo ensure only one instance of a class exists
DTo define a family of algorithms and make them interchangeable
Step-by-Step Solution
Solution:

  1. Step 1: Understand the pattern's behavior

    The Chain of Responsibility pattern allows a request to be passed along a chain of objects until one can handle it.

  2. Step 2: Compare options with the pattern's purpose

    The options describing singleton (one instance), prototype (object copies), and strategy (interchangeable algorithms) refer to other design patterns, not Chain of Responsibility.

  3. Final Answer:

    To pass a request along a chain of handlers until one handles it -> Option A

  4. Quick Check:

    Chain of Responsibility = pass request along chain [OK]
Quick Trick: Remember: Chain passes request until handled [OK]
Common Mistakes:
MISTAKES
  • Confusing with Singleton or Strategy patterns
  • Thinking it creates object copies
  • Assuming it handles all requests at once

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