[Solved] What is the main purpose of the Strategy pattern in system design? - Ans: To allow selecting an algorithm's behavior at runtime without changing the... | LLD

LLD - Behavioral Design Patterns — Part 1

What is the main purpose of the Strategy pattern in system design?

ATo restrict object creation to a single instance

BTo allow selecting an algorithm's behavior at runtime without changing the client code

CTo define a fixed sequence of steps for an algorithm

DTo create a single global instance of a class

Step-by-Step Solution

Solution:

Step 1: Understand the Strategy pattern goal
The Strategy pattern is designed to let you swap algorithms or behaviors dynamically without changing the client code.
Step 2: Compare options with pattern purpose
To allow selecting an algorithm's behavior at runtime without changing the client code correctly states this purpose. Options A and B describe Singleton pattern, and C describes Template Method pattern.
Final Answer:
To allow selecting an algorithm's behavior at runtime without changing the client code -> Option B
Quick Check:
Strategy pattern = runtime algorithm selection [OK]

Quick Trick: Strategy pattern = choose behavior at runtime [OK]

Common Mistakes:

MISTAKES

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What is the main purpose of the Strategy pattern in system design?