What is the MVC design pattern in Salesforce.com in Salesforce?

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

1. Model.
2. View.
3. Controller.

• Model: What Schema and Data does salesforce uses to represent the system completely. In Salesforce, we can say that sObject are the model.
  • Example: Sobjects, Apex Classes.
• View: How the Schema and data is represented. Visualforce is used to present the data to users.
  • Example: Pages, Components.
• Controller: How the interface actions. Controllers are used to perform the actions whenever users interact with Visualforce.
  • Example: Standard, Custom(Apex).