Mobile App Development Interview Questions in Coimbatore

import * as Location from 'expo-location'; export function MyLocation() { const [coords, setCoords] = useState(null); const [error, setError] = useState(null); useEffect(() => { (async () => { const { status } = await Location.requestForegroundPermissionsAsync(); if (status !== 'granted') { setError('Location permission denied'); return; } const pos = await Location.getCurrentPositionAsync({}); setCoords(pos.coords); })(); }, []); if (error) return <Text>{error}</Text>; if (!coords) return <ActivityIndicator />; return <Text>{coords.latitude}, {coords.longitude}</Text>; }

final productsProvider = FutureProvider.autoDispose<List<Product>>((ref) { final repo = ref.watch(productRepositoryProvider); return repo.fetchProducts(); }); class ProductsView extends ConsumerWidget { const ProductsView({super.key}); @override Widget build(BuildContext context, WidgetRef ref) { final products = ref.watch(productsProvider); return products.when( loading: () => const Center(child: CircularProgressIndicator()), error: (e, _) => const Center(child: Text('Failed to load')), data: (items) => ListView(children: [for (final p in items) ListTile(title: Text(p.name))]), ); } }

class UsersPage extends StatefulWidget { const UsersPage({super.key}); @override State<UsersPage> createState() => _UsersPageState(); } class _UsersPageState extends State<UsersPage> { late final Future<List<User>> _future = api.fetchUsers(); @override Widget build(BuildContext context) => FutureBuilder<List<User>>( future: _future, builder: (context, snap) { if (snap.connectionState != ConnectionState.done) { return const Center(child: CircularProgressIndicator()); } if (snap.hasError) return const Center(child: Text('Something went wrong')); final users = snap.data!; return ListView.builder( itemCount: users.length, itemBuilder: (_, i) => ListTile(title: Text(users[i].name)), ); }, ); }