Answer / Mukesh Sharma

{"MVVM (Model-View-ViewModel) is a design pattern used to separate the UI, data, and business logic layers in an application. The primary goal is to improve testability, maintainability, and separation of concerns.n1. Model: Represents the data and business logic.n2. View: Represents the visual representation of the data.n3. ViewModel: Acts as a bridge between the Model and View, providing a simplified interface for binding data and commands.nThree-tier architecture (also known as N-tier architecture) typically separates an application into three distinct layers: Presentation, Business Logic, and Data Access.n1. Presentation Layer: Handles user interaction.n2. Business Logic Layer: Contains the business rules and logic of the application.n3. Data Access Layer: Manages data storage and retrieval.

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