carlyadam / cracking-android

Cracking Android Technical Interviews

Cracking the Android Interview

Table of Contents

1. About this project
2. Fundamentals
3. Android SDK
4. Kotlin
5. Gradle
6. Android studio
7. UI
8. Best Practices
9. Arquitecture
10. Network operation
11. Firebase
12. Test
13. Proguard
14. CI/CD
15. Crash Reports
16. MAD(Modern Android Development)

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