Kotlin Flow vs StateFlow vs SharedFlow: Android Interview Questions in 2026
The Kotlin Flow vs StateFlow vs SharedFlow questions Android interviewers ask in 2026, with clear answers, a comparison table, and production-ready code.
Android
MOBILE
Native Android development with Kotlin as modern language and Jetpack Compose for declarative interfaces. MVVM/MVI architecture with ViewModel and Room, reactive programming with Flow, and dependency injection with Hilt.
What you'll learn
Modern Kotlin with null safety, coroutines and Flow
Jetpack Compose for declarative UI and Material Design 3
Architecture Components (ViewModel, LiveData, Navigation)
Room Database with migrations and TypeConverters
Retrofit + OkHttp for networking with interceptors
Dependency Injection with Hilt (based on Dagger)
WorkManager for reliable background tasks
Firebase (Auth, Firestore, Cloud Messaging, Analytics)
Comprehensive testing (JUnit, Espresso, MockK, Compose Testing)
Performance (Profiler, R8/ProGuard, Baseline Profiles)
Key topics to master
The most important concepts to understand this technology and ace your interviews
1
Kotlin: null safety, data classes, extensions, coroutines and Flow
2
Android fundamentals: Activity, Fragment, Intent, Context, Lifecycle
3
Jetpack Compose: Composables, State, Recomposition, Modifiers, LazyColumn
4
Classic UI: Views, Layouts (ConstraintLayout), RecyclerView, ViewBinding
5
Architecture: MVVM, MVI, Clean Architecture
6
ViewModel, LiveData, StateFlow and reactive state management
7
Room Database: entities, DAO, relationships, migrations, Flow integration
8
Navigation Component with SafeArgs and deep links
9
Retrofit: API definitions, Gson/Moshi, error handling, interceptors
10
Dependency Injection with Hilt: modules, scopes, qualifiers
11
WorkManager: constraints, chaining, periodic work, monitoring
12
Permissions (runtime), resources, configuration changes
13
Testing: unit tests (JUnit, MockK), UI tests (Espresso, Compose)
14
Performance: memory leaks, ANR, ProGuard, optimization
15
Firebase, Gradle, CI/CD and Play Store publishing
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