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Top 30 Kotlin Interview Questions — From Basics to Coroutines
The 30 most commonly asked Kotlin interview questions with clear answers and code examples. Covers basics (val/var, null safety, string interpolation)...
ANDROID 16 IS QUIET — BUT ONE OF THE MOST IMPORTANT RELEASES FOR DEVELOPERS
Android 16 (API level 36) is less about new UI features and more about making app behavior predictable and reliable. It introduces refinements in navi...
Latest Posts
OkHttp Interceptors and HTTP Caching — Auth Tokens, Logging, Retry, Offline Support, and Production Setup
HTTP request passes through OkHttp interceptors. This step-by-step guide covers the mental model (airport checkpoints), how interceptors work, applica...
Retrofit Complete Guide — HTTP Requests, JSON Parsing, Interceptors, Error Handling, and Production Setup
Retrofit generates HTTP client code from annotated Kotlin interfaces. This step-by-step guide covers the mental model, DTOs with Gson/Moshi, the API i...
Room Migrations, Relations, and Advanced TypeConverters — Schema Changes, One-to-Many, Many-to-Many, and Testing
Your database schema will change — migrations handle it without losing data. Your data model has connections — relations handle them clean...
Android Room Database — Entities, DAOs, Reactive Queries with Flow, TypeConverters, and Complete Setup
Room wraps SQLite with a type-safe, compile-time validated, Kotlin-native API. This step-by-step guide covers the mental model, Entity with @PrimaryKe...
SharedPreferences vs DataStore — Why DataStore Wins and How to Migrate Step by Step
SharedPreferences blocks the main thread, has no type safety, and silently fails. DataStore fixes everything with Flow, suspend functions, and typed k...
Nested Navigation Graphs — Group Screens, Pop Flows, Share ViewModels, and Multi-Module Navigation
Nested graphs group related screens into sub-graphs for organization, flow management, and shared ViewModels. This step-by-step guide covers the menta...
Android Deep Links and App Links — From Custom Schemes to Verified HTTPS, Step by Step
Deep links open specific screens from external URLs. App Links do it without the "Open with..." dialog. This step-by-step guide covers the mental mode...
Compose Navigation — Step-by-Step Guide from Zero to Production
Compose Navigation uses Kotlin instead of XML. This step-by-step guide builds from the mental model (stack of cards) through NavController, NavHost, r...
Android Navigation Component
The Navigation Component replaces manual FragmentTransaction with a declarative graph, type-safe args, and managed back stack. This guide covers nav_g...
Multi-Module Architecture in Android
Multi-module splits your app into focused modules with enforced boundaries. This guide covers module types (app, feature, core), the dependency graph ...
MVI Architecture in Android
MVI enforces unidirectional data flow with a single state object, sealed intents, and a pure reducer. This guide covers the MVI cycle, MVVM vs MVI com...
Clean Architecture in Android
Clean Architecture divides apps into Presentation, Domain, and Data layers with inward dependencies. This guide covers the dependency rule, Domain (pu...