Answer / Rakesh Singh Kutiyal

The Model-View-ViewModel (MVVM) pattern is an architectural approach used in WPF and other frameworks. Its key features include: 1) Separation of concerns between UI, business logic, and data (model), 2) Binding to easily connect UI elements with data and logic, 3) Data templates for creating custom UI layouts, 4) Commands for handling user input, 5) Improved testability due to separation of layers, and 6) Easier maintenance as changes in one layer do not affect others.

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