Topics

Every page on the site, with how many questions it carries. Start with the one you are weakest at.

• Android Interview Questions

  The whole of Android in one page. Core platform questions in full, plus the questions asked most often in every other area.

  126 questions, plus links to every other topic

• Kotlin Interview Questions

  The Kotlin questions Android interviewers actually ask, from val versus var to variance, answered in plain language you can say out loud.

  47 questions

• Kotlin Coroutines Interview Questions

  Every Kotlin Coroutines question an Android interviewer asks, answered in plain language you can say out loud.

  38 questions

• Kotlin Flow Interview Questions

  Kotlin Flow interview questions, from builders and operators to StateFlow and SharedFlow, answered in plain language you can say out loud.

  20 questions

• Android UI Interview Questions

  View system interview questions on Views, layouts, RecyclerView, dialogs and drawing, answered in plain language you can say out loud.

  33 questions

• Jetpack Compose Interview Questions

  Jetpack Compose interview questions on recomposition, state, side effects and performance, answered in plain language you can say out loud.

  46 questions

• Android Lifecycle Interview Questions

  Activity and Fragment lifecycle interview questions, plus ViewModel, configuration changes and process death, answered in plain language.

  31 questions

• Android Architecture Interview Questions

  MVVM, MVP, Clean Architecture and modularization interview questions for Android, answered in plain language you can say out loud.

  19 questions

• Android Dependency Injection Interview Questions

  Dependency injection interview questions for Android, covering the concepts plus Dagger, Hilt and Koin, answered in plain language.

  16 questions

• Android Networking Interview Questions

  Networking interview questions for Android, covering Retrofit and OkHttp, caching and interceptors, and the protocols behind real time features.

  12 questions

• Android Threading Interview Questions

  Android threading interview questions on Handler, Looper, thread pools and the Java concurrency primitives, answered in plain language.

  17 questions

• Android Storage and Database Interview Questions

  Storage interview questions for Android, covering SharedPreferences and DataStore, SQLite and Room, and how to choose between them.

  12 questions

• Android Testing Interview Questions

  Android testing interview questions covering unit tests, instrumentation and UI tests, and the tooling a Kotlin codebase actually uses.

  15 questions

• Android Performance Interview Questions

  Android performance interview questions on memory leaks, jank, app startup and battery use, answered in plain language you can say out loud.

  24 questions

• Gradle and Android Build Interview Questions

  Gradle, R8, CI and release interview questions for Android, covering the modern build setup rather than the one from five years ago.

  36 questions

• Android System Design Interview Questions

  Android system design interview questions, from designing a library to designing a feature, structured the way you would actually run the round.

  34 questions

• Design Patterns Interview Questions for Android

  Design pattern and SOLID interview questions for Android developers, each anchored in a library you have actually used rather than a textbook example.

  26 questions

• Java Interview Questions for Android Developers

  The Java and JVM questions Android interviewers still ask, from OOP and collections to equals and hashCode, answered in plain language.

  35 questions

• RxJava Interview Questions

  RxJava interview questions answered as legacy knowledge, with the Kotlin Flow equivalent named for each, plus image loading library internals.

  15 questions

• Android Coding Interview Questions

  Coding and data structure questions asked in Android interviews, answered as reasoning you can talk through rather than memorised solutions.

  55 questions

• Low Level Design (LLD) Interview Questions

  Low level design interview questions with the full class design and a working implementation in both Java and Kotlin, each problem on a page of its own.

  18 questions