Cross-platform framework developed by Google using Dart as programming language. Widget-based architecture with ultra-fast hot reload, native compilation (ARM/x64), and high-performance rendering via Skia. Build iOS, Android, Web and Desktop applications with a single codebase.
Modern Dart with null safety, async/await and strong typing
Widget-based architecture with composition and State management
Instant hot reload for ultra-fast development
Native compilation (AOT) for optimal performance
Material Design and Cupertino widgets for native UI
State management (Provider, Riverpod, Bloc, GetX)
Routing and navigation (Navigator 2.0, go_router)
Rich packages (pub.dev) for APIs, Firebase, animations
Comprehensive testing (unit tests, widget tests, integration tests)
Performance (60fps, Skia rendering, platform channels for native code)
The most important concepts to understand this technology and ace your interviews
Dart: types, null safety, async/await, futures, streams, isolates
Flutter architecture: Widget tree, Element tree, RenderObject tree
Widgets: StatelessWidget vs StatefulWidget, lifecycle (initState, build, dispose)
State management: setState(), InheritedWidget, Provider, Riverpod, Bloc
BuildContext: navigation, Theme.of, MediaQuery, accessing inherited data
Layout widgets: Container, Row, Column, Stack, Flexible, Expanded
Material Design: Scaffold, AppBar, BottomNavigationBar, Drawer, SnackBar
Cupertino widgets: CupertinoPageScaffold, CupertinoNavigationBar, pickers
Navigation: Navigator.push/pop, named routes, Navigator 2.0, go_router
Forms and input: TextField, Form, FormField, validation, TextEditingController
Lists: ListView, ListView.builder, GridView, CustomScrollView, Slivers
Networking: http package, dio, REST APIs, JSON serialization (json_serializable)
Local storage: shared_preferences, sqflite, hive, secure_storage
Animations: AnimatedContainer, AnimationController, Tween, Hero animations
Platform channels: MethodChannel for integrating native code (Kotlin/Swift)
Packages: pub.dev, firebase_core, flutter_bloc, freezed, go_router
Testing: testWidgets, mockito, integration_test, golden tests
Performance: const constructors, RepaintBoundary, ListView.builder, profiling
Responsive design: MediaQuery, LayoutBuilder, OrientationBuilder, AspectRatio
Build and deployment: flutter build, App Store/Play Store, CI/CD, flavors
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