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The GoF Design Patterns are broken into three categories: Creational Patterns for the creation of objects; Structural Patterns to provide relationship between objects; and finally, Behavioral Patterns to help define how objects interact.

These are design patterns which were defined by four authors – Erich Gamma, Richard Helm, Ralph Johnson and John Vlissides in their book Design Patterns: Elements of Reusable Object-Oriented Software. ...Sep 24, 2014

One of the most popular design patterns used by software developers is a factory method. It is a creational pattern that helps create an object without the user getting exposed to creational logic. The only problem with a factory method is it relies on the concrete component.Aug 11, 2021

These authors are collectively known as Gang of Four (GOF). Q 3 - Which of the following is correct list of classifications of design patterns. A - Creational, Structural and Behavioral patterns. ... C - Creational, Executional and Behavioral patterns.

Domain-driven design (DDD) is a software development philosophy centered around the domain, or sphere of knowledge, of those that use it. The approach enables the development of software that is focused on the complex requirements of those that need it and doesn't waste effort on anything unneeded.

Design Patterns in the object-oriented world is a reusable solution to common software design problems that occur repeatedly in real-world application development. It is a template or description of how to solve problems that can be used in many situations. "A pattern is a recurring solution to a problem in a context."Jun 17, 2021

Factory design pattern is most suitable when complex object creation steps are involved. To ensure that these steps are centralized and not exposed to composing classes. Abstract factory pattern is used whenever we need another level of abstraction over a group of factories created using factory pattern.Oct 22, 2020

Model View Controller (MVC)

MVC is a design pattern used to decouple user-interface (view), data (model), and application logic (controller). This pattern helps to achieve separation of concerns. ... The View renders the final page, based on the data in the Model.

Design patterns provide a standard terminology and are specific to particular scenario. For example, a singleton design pattern signifies use of single object so all developers familiar with single design pattern will make use of single object and they can tell each other that program is following a singleton pattern.