Design patterns are used to solve the recurring problems and complexities in designing software applications. The Gang of Four design patterns are divided into three categories: creational, structural, and behavioral. Creational design patterns are used to create and manage the mechanism of creating instances of classes. Structural design patterns are used to define the structure of types and their relationships. Behavioral design patterns are used to manage object collaboration and the delegation of responsibilities among objects. The proxy design pattern belongs to the structural category.
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