Can you describe the main types of relationships between components in MVVM architecture?

In MVVM (Model-View-ViewModel) architecture, the main components are connected as follows:

• View — displays data and interacts with the user.
• ViewModel — acts as an intermediary between View and Model, containing presentation logic and state.
• Model — business logic and data.

Types of connections:

1. View → ViewModel: The View subscribes to changes in the ViewModel (e.g., via Data Binding or observers). The ViewModel notifies the View about data updates.
2. ViewModel → Model: The ViewModel accesses the Model to retrieve or modify data.
3. Model → ViewModel: The Model can notify the ViewModel about changes (e.g., via callbacks or events), so the ViewModel can update its state.

Thus, the connection between View and ViewModel is usually bidirectional (through binding), and between ViewModel and Model is unidirectional (the ViewModel manages the Model). This ensures loose coupling and simplifies testing.