LLD - Design — Online Shopping Cart
Which component in the Payment Strategy Pattern is responsible for defining the common interface for all payment methods?
Which component in the Payment Strategy Pattern is responsible for defining the common interface for all payment methods?
easy📝 Conceptual Q2 of 15
Step-by-Step Solution
Solution:
Step 1: Identify the role of each component
The Strategy Interface defines the common methods all payment strategies must implement.Step 2: Differentiate from other components
Context uses the strategy, Concrete Strategy implements it, Client uses Context, but only Strategy Interface defines the contract.Final Answer:
Strategy Interface -> Option DQuick Check:
Common interface = Strategy Interface [OK]
Quick Trick: Interface defines common methods for all strategies [OK]
Common Mistakes:
- Confusing Context with interface
- Thinking Concrete Strategy defines interface
- Assuming Client defines methods
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