What is the MVC design pattern in Salesforce.com?

Model-View-Controller (MVC) design pattern is the one of the most popular design pattern which contains three modules.

• Model
• View
• Controller

Model : 

        

- What schema and data does sales force uses to represent the system completely.

- In salesforce, we can say that sObjects are the model.

Ex : Sobjects,Apex classes.

View :

 

- How the schema and data is represented. Visual force is used to present the data to users.

Ex : pages,Components.

Controller :

- How the interface actions is represented.

- Controllers used to perform operations/actions whenever users interact with Visual force.

Ex : Standard, Custom (Apex).