Mobile App Development Interview Questions in Kolkata

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>; }

function useFetch(url) { const [state, setState] = useState({ data: null, loading: true, error: null }); useEffect(() => { const controller = new AbortController(); fetch(url, { signal: controller.signal }) .then((r) => { if (!r.ok) throw new Error('HTTP ' + r.status); return r.json(); }) .then((data) => setState({ data, loading: false, error: null })) .catch((e) => { if (e.name !== 'AbortError') setState({ data: null, loading: false, error: e.message }); }); return () => controller.abort(); }, [url]); return state; }