[Solved] You want to enhance a payment system to allow splitting a single... Which design approach best supports this requirement, given that the naive Strategy Pattern supports only one strategy at a time? | OOP & Design Patterns

OOP & Design Patterns - Strategy Pattern - Replace Conditionals with Polymorphism

You want to enhance a payment system to allow splitting a single payment across multiple payment strategies simultaneously (e.g., part credit card, part UPI). Which design approach best supports this requirement, given that the naive Strategy Pattern supports only one strategy at a time?

ASingleton Pattern to manage payment instances

BComposite Pattern to combine multiple strategies

CObserver Pattern to notify multiple strategies

DFactory Pattern to create a single strategy

Step-by-Step Solution

Solution:

Step 1: Understand limitation of Strategy Pattern
The Strategy Pattern supports only one algorithm at a time.
Step 2: Identify suitable pattern for multiple strategies
The Composite Pattern allows treating multiple strategies as one combined object.
Final Answer:
Option B -> Option B
Quick Check:
Composite combines multiple strategies into one object [OK]

Quick Trick: Composite combines multiple strategies into one [OK]

Common Mistakes:

MISTAKES

Choosing Singleton which controls instance uniqueness
Observer is for event notification, not combining algorithms
Factory creates single instances, not composites

Trap Explanation:

PITFALL

Mistaking Singleton or Factory for multi-strategy support

Interviewer Note:

CONTEXT

Tests knowledge of design patterns beyond Strategy for complex requirements

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More OOP & Design Patterns Quizzes

Which design approach best supports this requirement, given that the naive Strategy Pattern supports only one strategy at a time?

Step 1: Understand limitation of Strategy Pattern

Step 2: Identify suitable pattern for multiple strategies

Final Answer:

Quick Check:

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