Design patterns are standard, reusable solutions to commonly occurring problems in software design and development. They provide a proven approach for designing flexible, maintainable, and scalable software systems. Design patterns are not ready-made code but templates or guidelines that developers can adapt according to their requirements. In web technologies, design patterns help organize application structure and improve code quality. Common examples include the Model-View-Controller (MVC) pattern, Singleton pattern, and Factory pattern. For example, the MVC pattern separates an application into three components: Model for data management, View for user interface, and Controller for handling requests and responses. Many Java web applications use the MVC pattern to maintain clear separation between business logic and presentation. A web application is a software application that runs on a web server and is accessed through a web browser using the internet or an internal network. Unlike desktop applications, web applications do not require installation on the user's computer and can be accessed from different devices. Web applications are developed using technologies such as HTML, CSS, JavaScript, Java, PHP, Python, and databases. Examples of web applications include online banking systems, e-commerce websites, social