Modularization: Layer-based vs Feature-based? - Android Interview Questions | Android Engineers

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Questions

•How does Garbage collection work?•What is a dangling pointer?•Elaborate Memory Leak?•Explain fragment lifecycle when it comes to ViewPager and sliding between different fragments.•Difference between FragmentStateAdapter and FragmentStatePagerAdapter.•Difference between Serializable and Parcelable? What are the disadvantages of Serializable?•How you could implement observable SharedPrefs or observable Databases i.e. Observe a certain key/table/query?•How does layout inflation work from xml tags to view references in memory?•What is a Thread, Handler, Looper, and Message Queue?•How does ViewModel instance provide to Activity and Fragment? How does ViewModelProviderStore decide when to retain the instance?•How do you inspect and solve the Jank issue?•How does OutOfMemory happen?•How do you find memory leaks in Android applications?•What is Doze? What about App Standby?•What does setContentView do?•Process of creating a custom view?•Deeplink understanding and architecture?•Notifications?•Difference between Fragment Lifecycle Observer and View Lifecycle Observer?•When should you use a Fragment rather than an Activity?•Explain the Android push notification system?•How LiveData is different from ObservableField?•What is the difference between setValue and postValue in LiveData?•What is process death?•What is ViewModelScope and how does it work internally?•What is Clean Architecture and its layers?•`ContentProvider` basic usage and why we need it?•Dalvik vs ART (Android Runtime)?•Explain `Looper`, `Handler`, and `MessageQueue`?•Service vs IntentService vs JobIntentService?•BroadcastReceiver limitations in newer Android versions?•`PendingIntent` immutability flags?•`Parcelable` vs `Serializable` performance?•SOLID Principles in Android context?•Benefits of the Repository Pattern?•Necessity of UseCases/Interactors?•Single Activity Architecture pros and cons?•What is the internal structure of an APK?•What are DEX files?•Android App Bundle (AAB) vs APK?•How does the Manifest Merging process work?•Evolution of the Android Permission Model?•What is the MVI (Model-View-Intent) Pattern?•Clean Architecture vs Hexagonal Architecture?▶Modularization: Layer-based vs Feature-based?•What is the Navigator Pattern for navigation?•Error handling strategies in Clean Architecture?•Build Variants vs Product Flavors?•How to chain requests in WorkManager?•Handling Deep Links with Navigation Component?•CameraX vs Camera2 API?•Basics of Media3 / ExoPlayer?

Android BasicsAdvanced4 min

Modularization: Layer-based vs Feature-based?

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How does Garbage collection work?

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Elaborate Memory Leak?

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Explain fragment lifecycle when it comes to ViewPager and sliding between different fragments.

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Difference between FragmentStateAdapter and FragmentStatePagerAdapter.

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