LLD - Behavioral Design Patterns — Part 2
Which of the following correctly represents the key components of the Memento pattern?
Which of the following correctly represents the key components of the Memento pattern?
easy🧠 Conceptual Q12 of 15
Step-by-Step Solution
Solution:
Step 1: Identify components of Memento pattern
The Memento pattern consists of three main parts: Originator (the object whose state is saved), Memento (the object storing the state), and Caretaker (manages mementos).Step 2: Eliminate other patterns
Options B, C, and D correspond to Observer, Proxy, and Decorator patterns respectively, which are unrelated to Memento.Final Answer:
Originator, Memento, Caretaker -> Option BQuick Check:
Components = Originator + Memento + Caretaker [OK]
Quick Trick: Remember 3 parts: Originator, Memento, Caretaker [OK]
Common Mistakes:
MISTAKES- Mixing Memento components with Observer or Proxy
- Forgetting the Caretaker role
- Confusing Memento with Decorator pattern
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