Design patterns · interview question
Your checkout flow wants one clean charge(order) call, but each payment provider ships a different SDK. Which design choice best protects the checkout core from provider churn?
Multiple choiceMediumchapter-13-curatedpremiumdesign-patternsfactory-pattern
Answer and explanation
Correct answer
A. A factory that selects provider-specific adapters behind a PaymentGateway interface
Why
The factory centralizes provider selection, while adapters translate each vendor SDK into the stable business interface your checkout flow expects. That keeps vendor quirks out of the core payment path.
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