Difference between MVVM and MVC

Question

Accepted Answer

MVVM focuses on separation of concerns by introducing a ViewModel layer, while MVC combines the responsibilities of the Model and Controller.

MVC stands for Model-View-Controller, where the Model represents the data, the View displays the data, and the Controller handles user input and updates the Model.
MVVM stands for Model-View-ViewModel, where the ViewModel acts as an intermediary between the View and the Model, handling user input and updating the Model.
In MVVM, the View is only responsible for displaying data and forwarding user input to the ViewModel, while in MVC, the View can directly interact with the Model.
MVVM promotes better testability and maintainability due to the separation of concerns, while MVC can lead to tighter coupling between components.
An example of MVVM is an iOS app where the ViewModel fetches data from a network service and updates the Model, which is then displayed in the View. An example of MVC is an iOS app where the View directly updates the Model without going through a separate ViewModel layer.

Top Infosys IOS Developer interview questions & answers