Explain the roles of ViewModel, Repository, and data source in MVVM
Source: developer.android.combeginner
Tests your grasp of unidirectional data flow and separation of concerns in Android MVVM. A strong answer maps ViewModel to UI state, Repository to data coordination, and Room or Retrofit to I/O.
This tests whether you understand unidirectional data flow and separation of concerns across Android MVVM layers. A strong answer explains that the ViewModel exposes UI state and handles user events without knowing data origins; the Repository abstracts multiple data sources and decides whether to serve cached Room data or fresh Retrofit network responses; and the data source performs actual disk or network I/O.
Read the original → developer.android.com
- #android
- #mvvm
- #architecture
- #viewmodel
- #repository
Get five bites like this every day.
Tezvyn delivers a daily feed of 60-second tech bites with quizzes to lock in what you learn.