LLD - Behavioral Design Patterns — Part 2
Which component in the Memento pattern is responsible for storing the internal state of the Originator?
Which component in the Memento pattern is responsible for storing the internal state of the Originator?
easy🧠 Conceptual Q2 of Q15
Step-by-Step Solution
Solution:
Step 1: Identify roles in Memento pattern
The Originator creates a Memento containing a snapshot of its current internal state. The Memento stores this state.Step 2: Match component to responsibility
The Memento is the object that stores the internal state. Caretaker manages Mementos but does not store state.Final Answer:
Memento -> Option AQuick Check:
State storage = Memento [OK]
Quick Trick: Memento stores state, Caretaker manages it [OK]
Common Mistakes:
MISTAKES- Confusing Caretaker as state holder
- Thinking Originator stores previous states
- Assuming Client stores state
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