GoF Pattern - Patterns Belongs To What Group

The Builder Pattern is a creational design pattern. Creational design patterns focus on the process of object creation, providing ways to create objects in a manner that is flexible, modular, and easy to understand. The Builder Pattern specifically aims to separate the construction of an object from its representation, allowing the same construction process to create different representations. This pattern is commonly used when there are complex objects to be created with multiple steps involved, providing a clear and organized way to construct them.

The Singleton Pattern belongs to the Creational Design Patterns group. Creational Design Patterns focus on object creation mechanisms, and the Singleton Pattern ensures that only one instance of a class is created and provides a global point of access to that instance. Therefore, it falls under the category of Creational Design Patterns.

The Abstract Factory Pattern belongs to the Creational Design Patterns group. Creational Design Patterns focus on object creation mechanisms, abstracting the process of object instantiation. The Abstract Factory Pattern provides an interface for creating families of related or dependent objects without specifying their concrete classes. It allows the client code to create objects without knowing the specific classes, promoting loose coupling and flexibility in the system's architecture.

The State Pattern is categorized as a Behavioral Design Pattern. This pattern is used to allow an object to alter its behavior when its internal state changes. It encapsulates the state-specific behavior into separate classes, making it easier to add new states without modifying existing code. By using this pattern, the object's behavior can vary based on its internal state, providing a more flexible and maintainable solution.

The Factory Method Pattern is a creational design pattern that provides an interface for creating objects, but allows subclasses to decide which class to instantiate. It encapsulates the object creation logic and delegates it to subclasses, promoting loose coupling between the creator and the created objects. This pattern is part of the creational design patterns group, which focuses on object creation mechanisms and provides solutions to create objects in a way that is flexible, reusable, and decoupled from the specific classes being instantiated.

The Observer Pattern belongs to the Behavioral Design Patterns group because it defines a one-to-many dependency between objects, where the change in one object triggers the automatic update of other dependent objects. This pattern is used to achieve loose coupling between objects and promotes the principle of encapsulation and abstraction.

The Composite Pattern belongs to the Structural Design Patterns group because it focuses on creating a structure of objects and how they can be composed into larger structures. This pattern allows clients to treat individual objects and compositions of objects uniformly, making it easier to work with complex hierarchies. It emphasizes the relationship between objects and their composition, rather than the creation process or behavior of the objects.

The Mediator Pattern belongs to the group of Behavioral Design Patterns. This pattern promotes loose coupling between objects by introducing a mediator object that encapsulates the communication between them. It helps to reduce dependencies and simplifies the communication between objects by routing it through a central mediator.

The Abstract Interpreter Pattern belongs to the Behavioral Design Patterns group. This pattern is used to define the grammar of a language and interpret sentences in that language. It allows for the creation of abstract syntax trees and provides a way to evaluate or execute these trees. This pattern focuses on the behavior of the objects and how they interact with each other to achieve a specific functionality.

The Prototype Pattern is a creational design pattern. It is used to create objects by cloning an existing object rather than creating new objects from scratch. This pattern allows for the creation of new objects without coupling the code to their specific classes, making it flexible and efficient. Therefore, the Prototype Pattern belongs to the creational design patterns group.

The Facade Pattern belongs to the Structural Design Patterns group. Structural Design Patterns focus on the composition of classes and objects to form larger structures and provide solutions for creating relationships between objects. The Facade Pattern is specifically used to provide a simplified interface to a complex system, hiding the complexities of the system behind a single interface.

The Abstract Chain of Responsibility Pattern belongs to the group of Behavioral Design Patterns. This pattern allows an object to pass a request along a chain of potential handlers until one of them handles the request. It decouples the sender and receiver of a request and allows multiple objects to handle the request without explicitly specifying the receiver. This pattern promotes loose coupling and flexibility in the system's design.

The Abstract Command Pattern belongs to the Behavioral Design Patterns group. This pattern is used to encapsulate a request as an object, allowing the parameterization of clients with different requests, queue or log requests, and support undoable operations. It focuses on the interaction between objects and how they communicate and collaborate with each other to achieve a specific behavior.

The Strategy Pattern belongs to the Behavioral Design Patterns group because it focuses on defining a family of algorithms, encapsulating each one, and making them interchangeable. It allows the algorithms to vary independently from the clients that use them, promoting flexibility and reusability in the design.

The Visitor Pattern belongs to the group of Behavioral Design Patterns. This pattern is used to separate the algorithm from the objects on which it operates. It allows adding new operations to existing object structures without modifying those structures. The Visitor Pattern is focused on defining a new operation to be performed on the elements of an object structure, without changing the classes of the elements themselves.

The Bridge Pattern belongs to the group of Structural Design Patterns. Structural design patterns focus on the composition of classes and objects to form larger structures while keeping them flexible and efficient. The Bridge Pattern specifically aims to decouple an abstraction from its implementation, allowing both to vary independently. By using this pattern, we can avoid the complexities of multiple class inheritance and achieve a more flexible and maintainable code structure.

The Abstract Iterator Pattern belongs to the Behavioral Design Patterns group because it focuses on the interaction and communication between objects. This pattern is used to provide a way to access the elements of an aggregate object sequentially without exposing its underlying representation. It emphasizes the behavior and communication patterns between objects rather than their creation or structure.

The Adapter Pattern belongs to the Structural Design Patterns group because it focuses on how objects and classes are structured and organized to form larger structures and provide new functionalities. The Adapter Pattern specifically deals with adapting the interface of one class to match the interface of another class, allowing them to work together seamlessly. It helps to bridge the gap between incompatible interfaces and promotes code reusability and flexibility.

The Abstract Flyweight Pattern belongs to the Structural Design Patterns group. Structural design patterns focus on how objects and classes are composed to form larger structures, while behavioral design patterns focus on communication between objects and the assignment of responsibilities. The Flyweight pattern specifically deals with efficiently sharing objects to minimize memory usage.

The Memento Pattern is categorized as a Behavioral Design Pattern. This pattern is used to capture and externalize an object's internal state, allowing the object to be restored to its previous state later on. It provides a way to store and retrieve snapshots of an object's state without violating encapsulation. This pattern is commonly used in situations where undo/redo functionality is required or when the state of an object needs to be saved and restored at different points in time.

The Decorator Pattern belongs to the Structural Design Patterns group. This pattern allows for adding new functionality to an object dynamically by wrapping it in a decorator class. It enhances the object's behavior without changing its interface. This pattern is commonly used when there is a need to add additional features to an object at runtime, rather than using inheritance to create subclasses with different behavior.

The Abstract Private Class Data Pattern is a design pattern that focuses on encapsulating private data within a class and providing controlled access to it through public methods. This pattern helps in maintaining data integrity and preventing direct access to the private data from outside the class. It is categorized under Structural Design Patterns because it deals with the structure of classes and objects and how they can be organized to form larger structures.

The Template Method Pattern is classified as a Behavioral Design Pattern because it focuses on the communication between objects and the behavior of objects. This pattern defines the skeleton of an algorithm in a base class, allowing subclasses to override specific steps of the algorithm without changing its structure. By doing so, it promotes code reusability and allows for variations in the behavior of related objects.

The Abstract Proxy Pattern belongs to the Structural Design Patterns group. Structural Design Patterns focus on the composition of classes and objects to form larger structures and provide solutions for creating relationships between different entities. The Abstract Proxy Pattern specifically deals with creating a proxy object that acts as a placeholder for another object, controlling access to it and providing additional functionality when needed. This pattern helps in achieving a flexible and efficient design by providing a layer of indirection between clients and the real objects they interact with.

The Object Pool Pattern is a creational design pattern. It is used to create a pool of reusable objects that can be shared among multiple clients. This pattern improves performance and reduces object creation overhead by reusing objects instead of creating new ones. Therefore, the correct answer is Creational Design Patterns.