Advanced Android Architecture Patterns Questions

Deep Android specific architecture and engineering patterns for maintainable scalable applications. Covers Clean Architecture and modularization, reactive programming with RxJava and Kotlin Coroutines, dependency injection with Dagger or Hilt, Jetpack component patterns such as ViewModel and LiveData, lifecycle and navigation concerns, concurrency and threading patterns, memory management, testing strategies including unit integration and instrumentation tests, Gradle multi module builds, and migration strategies for evolving legacy Android codebases.