Interview

Android interviews in 2026 focus on Jetpack Compose, Kotlin coroutines, and modern architecture. The old questions about XML layouts and AsyncTask are mostly gone. This guide covers the 30 most common Android interview questions. Each answer is short and practical. Questions are grouped by difficulty level: Beginner, Intermediate, and Advanced. Quick Reference — Modern Android Stack (2026) Component Old Way Modern Way (2026) UI XML Layouts Jetpack Compose Navigation Fragment transactions Navigation Compose State management LiveData StateFlow + Compose State Async work AsyncTask / RxJava Kotlin Coroutines + Flow DI Dagger 2 Hilt / Koin Database SQLite / Cursor Room Networking Volley Retrofit / Ktor Image loading Picasso Coil Architecture MVC / MVP MVVM / MVI Beginner Questions (1-10) 1. What are the four main Android components? The four main components are Activity (screens), Service (background work), BroadcastReceiver (system events), and ContentProvider (shared data). Each component has its own lifecycle. They are declared in the AndroidManifest.xml file. ...

Preparing for a Kotlin interview? This guide covers the 50 most common questions asked in 2026. Questions are grouped by difficulty. Each answer is short and clear. Code examples are included where they help. Quick Reference — Key Kotlin Features Feature What It Does Null safety Compiler prevents null pointer exceptions Coroutines Lightweight concurrency without threads Extension functions Add functions to existing classes Data classes Auto-generate equals, hashCode, toString, copy Sealed classes Restricted class hierarchies Smart casts Automatic type casting after type checks Scope functions let, run, with, apply, also Companion objects Static-like members in classes Beginner Questions (1-20) 1. What is Kotlin? Kotlin is a modern, statically-typed language developed by JetBrains. It runs on the JVM and compiles to JavaScript or native code. Google made it the preferred language for Android in 2019. It is 100% interoperable with Java. ...