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purpose of the ByRef keyword in VB.NET, ASP.NT,
– MVC is three-layer architecture where M stands for MODEL, V stands for VIEW, and C stands for CONTROLLER. Thus, every layer in MVC is assigned with a unique responsibility. So, the View is for the look and feel as well as for positioning what the end user will actually see. The model supplies the data and business logic. So, the models are nothing but just a class and a model can interact with the data access layer, some kind of service, like WCF Service or Web Service, which gives the data. The controller is actually the one which handles the incoming requests and it deals with both the layers.
Since MVC separates the business logic and presentation layer from each other. It was traditionally used for desktop graphical user interfaces (GUIs). Nowadays, MVC architecture has become popular for designing web applications as well as mobile apps