React Query for data fetching in React Native - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is React Query used for in React Native apps?

React Query helps manage server state by fetching, caching, and updating data in React Native apps easily and efficiently.

beginner

Which hook do you use to fetch data with React Query?

You use the useQuery hook to fetch and cache data in React Query.

intermediate

What are the two main arguments passed to useQuery?

The first is a unique key (string or array) to identify the query, and the second is an async function that fetches the data.

intermediate

How does React Query improve user experience during data fetching?

It caches data to avoid unnecessary loading, shows loading and error states, and updates data in the background smoothly.

beginner

What is the purpose of the QueryClientProvider in React Query?

It provides the React Query client to your app, enabling hooks like useQuery to work anywhere inside the provider.

Which React Query hook is used to fetch data?

A useData

B useFetch

C useQuery

D useEffect

The useQuery hook is the main hook React Query provides for fetching and caching data.

What does the unique key in useQuery help with?

A Identifying and caching the query data

B Styling the component

C Handling user input

D Managing navigation

The unique key identifies the query so React Query can cache and update the correct data.

How does React Query handle loading states?

A It automatically shows a spinner

B It provides a <code>isLoading</code> boolean from <code>useQuery</code>

C It disables the app until data loads

D It does not handle loading states

React Query returns isLoading so you can show loading UI yourself.

What is the role of QueryClientProvider?

A To handle navigation

B To style the queries

C To fetch data automatically

D To provide the React Query client to the app

QueryClientProvider wraps your app and provides the client needed for React Query hooks.

Which of these is NOT a benefit of React Query?

A Built-in UI components for forms

B Simplified data fetching logic

C Automatic caching of data

D Background data updates

React Query does not provide UI components for forms; it focuses on data fetching and caching.

Explain how React Query manages data fetching and caching in a React Native app.

Think about how you tell React Query what data to get and how it remembers it.

Describe the setup steps needed to use React Query in a React Native project.

Consider what you do before fetching data and how you connect React Query to your app.