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)...
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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...
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Unit Testing in Android — JUnit 5, MockK, Turbine, ViewModels, Flows, and Production Patterns
Unit tests catch bugs before users do. This guide walks through the core mindset, setup with JUnit 5, MockK, Turbine, and coroutines-test, and how to ...
MVVM — Unidirectional Data Flow, Process Death Survival, SavedStateHandle, and State Restoration Strategies
Most MVVM tutorials skip two key topics: state flow and process death. This guide covers Unidirectional Data Flow (state DOWN, events UP, single seale...
Compose Snapshot System — How mutableStateOf Tracks Reads, Writes, and Triggers Recomposition
How does Compose know which composable reads which state? Through the Snapshot system. This guide explains what mutableStateOf creates (SnapshotMutabl...
How WorkManager Works Internally — WorkDatabase, Schedulers, Constraint Monitoring, Expedited Work, and Survival Across Reboot
WorkManager stores tasks in a Room database and uses system APIs to run them. It covers WorkDatabase tables (WorkSpec, Constraint, Dependency), schedu...
How Room Works Internally — Code Generation, InvalidationTracker, WAL, Threading, and Schema Validation
Room generates real implementation classes at compile time — no reflection. This guide opens Room's hood: what AppDatabase_Impl and ArticleDao_I...
CoroutineContext, Scopes, and Error Handling — SupervisorJob, ExceptionHandler, ensureActive, NonCancellable
CoroutineContext is the configuration system powering every coroutine. This guide covers Elements and Keys with the + operator, context inheritance, C...
Hilt Dependency Injection — Compile-Time Code Gen, Internals, Compose Injection, @EntryPoint, and Production Patterns
Hilt generates all DI code at compile time — no reflection, no runtime errors. This complete guide covers the mental model, how Dagger generates...
Image Loading in Android — Coil for Compose, Glide for XML, Caching, Transformations, and Production Patterns
Loading images means downloading, decoding, resizing, caching, and error handling — libraries do it in one line. This step-by-step guide covers ...
Title: WorkManager in Android — Background Work, Constraints, Chaining, Foreground Service, and Hilt Integration
WorkManager guarantees background work even if the app closes or the phone restarts. This step-by-step guide covers the mental model (postal service),...
Paging 3 in Android — PagingSource, RemoteMediator, LazyColumn Integration, and Offline-First Pagination
Load 10,000 items 20 at a time as the user scrolls. This step-by-step guide covers the mental model, network-only PagingSource with load/getRefreshKey...
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...
