Warning
Data layer design is where most bugs hide. Security (SSL/TLS, authentication), database transactions, and async patterns separate careful engineers from careless ones. Interview frequency: CRITICAL.
Data Integration Stack
mindmap
root((Data & Networking))
Networking & APIs
Retrofit Lifecycle
HTTP Concepts
API Design Patterns
Error Handling
Room Database
Entities & DAOs
Transactions
Migrations
Performance
Network Security
SSL/TLS Handshake
Certificate Pinning
Cleartext Policies
Async Patterns
RxJava Operators
Coroutines Flows
Error Propagation
Analytics & Monitoring
Event Tracking
Crash Reporting
Auth & Features
BiometricPrompt
In-App Billing
Feature Flags
| File | Topic | Description | Key Interview Topics |
|---|---|---|---|
| networking-api.md | Networking & API Design | Retrofit, HTTP, API patterns | Interceptors, request lifecycle, error handling |
| room-database.md | Room Database Advanced Patterns | Entities, DAOs, transactions | Transactions, foreign keys, query optimization |
| ssl-network-security.md | SSL/TLS & Network Security | Certificate pinning, cleartext policies | Certificate pinning implementation, Man-in-the-Middle attacks |
| rxjava-vs-coroutines.md | RxJava vs. Coroutines Comparison | Reactive vs async patterns | Operator chaining, flow operators, backpressure |
| analytics-crash.md | Analytics & Crash Reporting | Firebase Analytics, Crashlytics | Event property limits, PII redaction |
| biometric-billing.md | Biometric Authentication & In-App Billing | BiometricPrompt, Play Billing | Biometric flow, Play Billing state machine |
| feature-flags-ab.md | Feature Flags & A/B Testing | Experiments, rollouts | Rollout strategy, statistical significance |
| 🚀 Kotlin | 🔧 Core | 🏗️ Design |
|---|---|---|
| Kotlin | Android Core | Architecture |
| 🎨 UI | 💡 Strategy | ⚡ Performance |
|---|---|---|
| UI & Graphics | Interview Strategy | Performance |
| 🔨 Build |
|---|
| Build & Testing |