Question 1: What problem does React Query primarily solve?
- Client-side state management
- Server-state management
- Routing
- Styling
Explanation: React Query is designed to manage server-state such as API data.
This easy-level React Query quiz is designed for beginners who want to understand server-state management in React applications. It covers core concepts like fetching data, caching, loading states, and basic React Query hooks in a simple, interview-friendly way.
Explanation: React Query is designed to manage server-state such as API data.
Explanation: React Query is part of the TanStack Query family.
Explanation: useQuery is the primary hook for fetching data.
Explanation: useQuery provides data, loading, and error states.
Explanation: Query keys uniquely identify cached queries.
Explanation: isLoading is true while data is being fetched.
Explanation: React Query stores data in an in-memory cache.
Explanation: staleTime controls how long data is considered fresh.
Explanation: Stale data can be refetched on window focus or re-mount.
Explanation: React Query refetches on window focus by default.
Explanation: useMutation is used for modifying server data.
Explanation: Mutations change data on the server.
Explanation: isPending indicates an ongoing mutation.
Explanation: useQuery exposes an error state when a request fails.
Explanation: retry defines how many times a failed query retries.
Explanation: invalidateQueries marks cached data as stale.
Explanation: useQueryClient provides access to the query client.
Explanation: Arrays allow query keys to include parameters.
Explanation: cacheTime controls how long inactive data stays in cache.
Explanation: QueryClientProvider makes the client available to hooks.
Explanation: React Query is imported from @tanstack/react-query.
Explanation: Stale data may refetch on remount.
Explanation: refetchOnWindowFocus can disable focus-based refetch.
Explanation: React Query simplifies manual data fetching logic.
Explanation: isFetching indicates background refetching.
Explanation: Caching improves performance and reduces network calls.
Explanation: Background refetching updates data automatically.
Explanation: enabled controls conditional query execution.
Explanation: refetchInterval enables polling.
Explanation: React Query focuses on server state.
Explanation: Fetched data is available in data.
Explanation: retry: false disables retry attempts.
Explanation: onSuccess executes after successful fetch.
Explanation: enabled allows dependent query execution.
Explanation: Higher staleTime reduces refetch frequency.
Explanation: React Query does not manage local form state.
Explanation: removeQueries removes cached queries.
Explanation: Optimistic updates update UI before server response.
Explanation: useMutation handles form submissions.
Explanation: React Query shares cached data by key.
Explanation: retryDelay controls retry timing.
Explanation: refetch manually triggers data fetching.
Explanation: enabled: false stops automatic execution.
Explanation: React Query simplifies data fetching with minimal setup.
Explanation: isError becomes true when a query fails.
Explanation: QueryClient manages caching and query behavior.
Explanation: React Query is optimized for server data.
Explanation: React Query simplifies and optimizes server-state management.
This easy-level React Query quiz is designed for beginners who want to understand server-state management in React applications. It covers core concepts like fetching data, caching, loading states, and basic React Query hooks in a simple, interview-friendly way.