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Cracking the Android Interview

About

After 7 years of experience in Android development, I have been on both sides as an interviewer and as a candidate. Cracking a technical job interview can be a challenging task and we have to be prepared to demonstrate our knowledge. That's why I decided to create this study guide according to my experiences and try to keep it updated to help others and myself get the dream job when facing a new interview. Feel free to make a pull request and collaborate.

note: References come from authors of the blogs, stackoverflow posts and the online android community.

Enjoy it ;)

Fundamentals

🙂

• ✔️ Android components : Reference

• ✔️ Fragment lifecycle and Activity lifecyle

• ✔️ Implicity vs explicity intents

• ✔️ .dex files : Reference

• ✔️ Multidex : Reference

• ✔️ Abstract class vs interface : Reference

Android_SDK

🛠

• ✔️ Components, Patterns, Architecture : Reference

Kotlin

😃

• ✔️ Advantages vs Java : Reference
• ✔️ Inline functions
• ✔️ Differents between lazy, latein : Reference
• ✔️ Extension functions : Reference
• ✔️ Kotlin kapt : Reference
• ✔️ Data class : Reference
• ✔️ Static class Kotlin : Reference
• ✔️ Singleton in Kotlin : Reference

Gradle

😅

-Gradle settings
-Build config
-BuildTypes
-Signing configuration
-Android keystore
-Flavors

Android_Studio

🧑‍💻

-Profile tools
-Apk analyzer
-Database inspector

UI

🧑‍🎨

-Viewbindings vs databinding vs kotlin synthetics
-RecyclerView.Adapter.StateRestorationPolicy
-Recycler adapter why list adapter, Adapter viewholder,onbindviewholder,oncreateviewholder definitions
-Diff call utils
-UX patterns
-Jetpack Compose

Best_Practices

💪

• ✔️ Design Patterns : Reference
• ✔️ SOLID : Reference
• ✔️ Inversion Control vs dependency injection : Reference
• ✔️ HILT vs Koin vs Dagger 2 : Reference
• ✔️ Ktlint : Reference
• ✔️ Memory leaks : Reference
• ✔️ Png to webp/ vector smaller apk

Architecture

😎

• ✔️ MVVM : Reference
• ✔️ MVVM vs MVC vs MVI : Reference
• ✔️ Clean Architecture : Reference
• ✔️ SaveStateHandle advantages

Network

📱

✔️ Retrofit vs ktor vs volley
✔️ Converter gson vs moshi
✔️ Parcelable vs Serializable
✔️ Okhttp
✔️ Interceptors
✔️ Glide vs Picasso vs coil

Firebase

🔧

✔️ Crashlitics
✔️ Push Notifications
✔️ Firebase test labs

Test

✅

• ✔️ Fundamentals : Reference
• ✔️ Robolectric : Reference
• ✔️ Mockk : Reference
• ✔️ Mock, stups, spies : Reference
• ✔️ Screenshots test : Reference
• ✔️ Expresso : Reference
• ✔️ Mockwebserver : Reference
• ✔️ Firebase remote config A/B testing : Reference

Proguard

⚙️

✔️ Rules
✔️ Advantages

CI_CD

💻

✔️ Bitrise vs Github actions vs Jenkins

Crash

❌

• ✔️ Bugsnag vs Crashlitics: Reference

MAD

👌

• ✔️ AndroidX: Reference
• ✔️ Jetpack : Reference
• ✔️ Architecture components : Reference
• ✔️ Flow – Livedata : Reference
• ✔️ Coroutines Advantages coroutines vs rx java, rx android : Reference
• ✔️ Room : Reference
• ✔️ Paging : Reference

Contact

Carlos Adan - @carlyad4m