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Which advantage does the Visitor pattern provide when you need to perform operations across a set of unrelated object classes?

easy🧠 Conceptual Q1 of 15
LLD - Behavioral Design Patterns — Part 2
Which advantage does the Visitor pattern provide when you need to perform operations across a set of unrelated object classes?
AIt enforces strict inheritance among element classes.
BIt allows adding new operations without changing the object classes.
CIt eliminates the need for interfaces in element classes.
DIt automatically generates visitor classes at runtime.
Step-by-Step Solution
Solution:

  1. Step 1: Understand Visitor pattern purpose

    The Visitor pattern separates an algorithm from the objects it operates on.

  2. Step 2: Identify benefit

    This separation allows adding new operations without modifying existing element classes.

  3. Final Answer:

    It allows adding new operations without changing the object classes. -> Option B

  4. Quick Check:

    Adding operations without modifying elements [OK]
Quick Trick: Visitor adds operations without altering elements [OK]
Common Mistakes:
MISTAKES
  • Thinking Visitor changes element class hierarchy
  • Assuming Visitor removes need for interfaces
  • Believing Visitor auto-generates code

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