Explanation:

The Context Rules Framework in Salesforce Industries CPQ does not rely on a single interface for all operations. Instead, it uses multiple specialized interfaces, each with its own implementation, to handle different aspects of rule evaluation and execution. These interfaces work together to qualify products, promotions, pricing adjustments, and more.

Here are some key interfaces used in the framework:

ContextRuleService – Evaluates rule conditions for products and promotions.
ProductAvailabilityOpenInterface – Determines which products are shown in the cart.
TightestMatchInterface – Selects the best price list entry when multiple qualify.
PricingManAdjEligibilityInterface – Evaluates eligibility for manual pricing adjustments.
RepricingManAdjEligibilityInterface – Used in batch repricing jobs.

Each interface has one or more implementations, and developers must activate the correct implementation to ensure the rules behave as expected.