React Interview Questions and Answers

Welcome to the React Interview Preparation Repository, your go-to resource for mastering React and acing your next tech interview. Whether you're a beginner or an experienced developer, here you'll find a curated collection of interview questions, detailed answers, practical examples, and essential tips tailored specifically for React.

What's Inside:

• Comprehensive Q&A: Extensive coverage of React interview questions spanning from basics to advanced topics.
• Concept Explanations: Clear and detailed explanations of React concepts such as JSX, components, state management, hooks, and more.
• Code Examples: Practical examples demonstrating how to implement React concepts effectively in real-world scenarios.
• Interview Tips: Best practices and strategies to excel in React interviews, including tips on problem-solving and demonstrating expertise.

How to Use:

• Study and Practice: Browse through the questions and answers to deepen your understanding of React concepts.
• Code Along: Use the provided code examples to practice and reinforce your React skills.
• Prepare Effectively: Follow the interview tips to enhance your confidence and performance during interviews.

Contributing:

Contributions are welcome! If you have React interview questions, answers, or additional resources to share, please open an issue or submit a pull request. Your contributions help improve this repository and benefit the React community.

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Happy coding and good luck with your React interviews!

Table of Contents

No.	Title	Show Answer
1	What is React?	Show Answer
2	What are the main features of React?	Show Answer
3	What is JSX?	Show Answer
4	How does JSX differ from HTML?	Show Answer
5	What is a component in React?	Show Answer
6	What are functional components?	Show Answer
7	What are class components?	Show Answer
8	How do you create a React application?	Show Answer
9	What is the purpose of render() in React?	Show Answer
10	What is a state in React?	Show Answer
11	How do you update the state in a React component?	Show Answer
12	What are props in React?	Show Answer
13	How do you pass props to a component?	Show Answer
14	What is the difference between state and props?	Show Answer
15	What is the use of the key prop in React?	Show Answer
16	What are React fragments?	Show Answer
17	How do you handle events in React?	Show Answer
18	What is conditional rendering in React?	Show Answer
19	How do you perform list rendering in React?	Show Answer
20	What are React lifecycle methods?	Show Answer
21	What is the difference between componentWillMount and componentDidMount?	Show Answer
22	What is the use of componentWillUnmount in React?	Show Answer
23	What is the purpose of shouldComponentUpdate in React?	Show Answer
24	How do you handle errors in React using error boundaries?	Show Answer
25	What is the use of refs in React?	Show Answer
26	How do you create refs in React?	Show Answer
27	What is the use of controlled components in React?	Show Answer
28	What is the use of uncontrolled components in React?	Show Answer
29	What is the purpose of default props in React?	Show Answer
30	How do you optimize performance in a React application?	Show Answer

Advanced React

No.	Title	Show Answer
31	What is the context API in React?	Show Answer
32	How do you use the context API?	Show Answer
33	What are React hooks?	Show Answer
34	What is the use of useState hook?	Show Answer
35	What is the use of useEffect hook?	Show Answer
36	How do you create custom hooks in React?	Show Answer
37	What is the use of useContext hook?	Show Answer
38	What is the use of useReducer hook?	Show Answer
39	How do you use the useMemo hook?	Show Answer
40	What is the use of useCallback hook?	Show Answer
41	What is the use of useRef hook?	Show Answer
42	How do you handle side effects in React?	Show Answer
43	What is React.lazy?	Show Answer
44	What is React.Suspense?	Show Answer
45	How do you implement code splitting in React?	Show Answer
46	What is server-side rendering (SSR) in React?	Show Answer
47	How do you implement SSR in React?	Show Answer
48	What is static site generation (SSG) in React?	Show Answer
49	How do you implement SSG in React?	Show Answer
50	What is hydration in React?	Show Answer
51	What is the use of React.PureComponent?	Show Answer
52	What is the difference between React.PureComponent and React.Component?	Show Answer
53	How do you implement higher-order components (HOC) in React?	Show Answer
54	What are render props?	Show Answer
55	What is the use of React.memo?	Show Answer
56	How do you handle asynchronous data fetching in React?	Show Answer
57	What is the use of the Suspense component with data fetching?	Show Answer
58	How do you manage global state in a React application?	Show Answer
59	What are some common performance optimization techniques in React?	Show Answer
60	What is the difference between client-side and server-side rendering in React?	Show Answer

React with TypeScript

No.	Title	Show Answer
1	What are the benefits of using TypeScript with React?	Show Answer
2	How do you set up a React application with TypeScript?	Show Answer
3	What is the purpose of the tsconfig.json file?	Show Answer
4	How do you define types for props in a functional component?	Show Answer
5	How do you define types for props in a class component?	Show Answer
6	What is the use of the React.FC type?	Show Answer
7	How do you define types for state in a class component?	Show Answer
8	How do you use TypeScript with React hooks?	Show Answer
9	How do you define types for useState hook?	Show Answer
10	How do you define types for useEffect hook?	Show Answer
11	How do you define types for custom hooks?	Show Answer
12	How do you handle event types in React with TypeScript?	Show Answer
13	How do you type ref objects in React with TypeScript?	Show Answer
14	How do you type context in React with TypeScript?	Show Answer
15	What is the use of the React.Context type?	Show Answer
16	How do you define types for higher-order components?	Show Answer
17	How do you handle default props in React with TypeScript?	Show Answer
18	How do you use generics in React components?	Show Answer
19	How do you type children props in React with TypeScript?	Show Answer
20	How do you use TypeScript with React Router?	Show Answer
21	How do you define types for route parameters in React Router?	Show Answer
22	How do you use TypeScript with Redux?	Show Answer
23	How do you define types for actions in Redux?	Show Answer
24	How do you define types for reducers in Redux?	Show Answer
25	How do you define types for thunks in Redux?	Show Answer
26	How do you use TypeScript with Redux Toolkit?	Show Answer
27	How do you define types for slices in Redux Toolkit?	Show Answer
28	How do you define types for async thunks in Redux Toolkit?	Show Answer
29	How do you use TypeScript with styled-components?	Show Answer
30	How do you define types for styled-components?	Show Answer
31	How do you handle third-party libraries without type definitions?	Show Answer
32	What is the use of the DefinitelyTyped repository?	Show Answer
33	How do you write type definitions for third-party libraries?	Show Answer
34	How do you configure Webpack for a React TypeScript application?	Show Answer
35	What are some best practices for using TypeScript with React?	Show Answer
36	How do you migrate a JavaScript React project to TypeScript?	Show Answer
37	How do you handle type inference in React with TypeScript?	Show Answer
38	How do you define types for form data in React with TypeScript?	Show Answer
39	How do you handle errors in a React TypeScript application?	Show Answer
40	How do you integrate TypeScript with Jest for testing React components?	Show Answer

Redux

No.	Title	Show Answer
1	What is Redux?	Show Answer
2	What are the core principles of Redux?	Show Answer
3	What is a store in Redux?	Show Answer
4	How do you create a store in Redux?	Show Answer
5	What is an action in Redux?	Show Answer
6	What is an action creator?	Show Answer
7	What is a reducer in Redux?	Show Answer
8	How do you create a reducer in Redux?	Show Answer
9	What is the purpose of combineReducers?	Show Answer
10	What is middleware in Redux?	Show Answer
11	How do you apply middleware in Redux?	Show Answer
12	What is the purpose of the thunk middleware?	Show Answer
13	How do you handle asynchronous actions in Redux?	Show Answer
14	What is the use of the Redux DevTools extension?	Show Answer
15	What are selectors in Redux?	Show Answer
16	How do you use the useSelector hook in Redux?	Show Answer
17	What is the useDispatch hook in Redux?	Show Answer
18	What is the connect function in Redux?	Show Answer
19	How do you connect a React component to Redux?	Show Answer
20	What is the purpose of mapStateToProps?	Show Answer
21	What is the purpose of mapDispatchToProps?	Show Answer
22	What is the difference between mapStateToProps and useSelector?	Show Answer
23	How do you handle side effects in Redux?	Show Answer
24	What is the use of Redux Saga?	Show Answer
25	How do you implement Redux Saga in a React application?	Show Answer
26	What are some best practices for structuring a Redux application?	Show Answer
27	How do you handle large-scale applications with Redux?	Show Answer
28	What are some common performance issues with Redux, and how do you address them?	Show Answer
29	How do you persist the Redux state across page reloads?	Show Answer
30	What is the use of the Redux Persist library?	Show Answer

Redux Toolkit

No.	Title	Show Answer
1	What is Redux Toolkit?	Show Answer
2	What are the main features of Redux Toolkit?	Show Answer
3	How do you set up a Redux store using Redux Toolkit?	Show Answer
4	What is createSlice in Redux Toolkit?	Show Answer
5	How do you create a slice using createSlice?	Show Answer
6	What is createAsyncThunk in Redux Toolkit?	Show Answer
7	How do you handle asynchronous actions using createAsyncThunk?	Show Answer
8	What is the configureStore function in Redux Toolkit?	Show Answer
9	How do you integrate Redux Toolkit with React?	Show Answer
10	What is the createEntityAdapter function in Redux Toolkit?	Show Answer
11	How do you normalize data using createEntityAdapter?	Show Answer
12	What is the use of the createReducer function?	Show Answer
13	How do you handle side effects with Redux Toolkit?	Show Answer
14	What are some best practices for using Redux Toolkit?	Show Answer
15	How do you migrate from Redux to Redux Toolkit?	Show Answer
16	What is the use of the createAction function in Redux Toolkit?	Show Answer
17	How do you create custom middleware with Redux Toolkit?	Show Answer
18	What is the difference between createSlice and createReducer?	Show Answer
19	How do you structure a large-scale application using Redux Toolkit?	Show Answer
20	What is the use of the nanoid function in Redux Toolkit?	Show Answer

React Router DOM

No.	Title	Show Answer
1	What is React Router?	Show Answer
2	What are the main features of React Router?	Show Answer
3	How do you set up routing in a React application?	Show Answer
4	What is the use of the BrowserRouter component?	Show Answer
5	How do you define routes in React Router?	Show Answer
6	What is the Route component in React Router?	Show Answer
7	What is the Link component in React Router?	Show Answer
8	What is the NavLink component in React Router?	Show Answer
9	How do you perform navigation programmatically in React Router?	Show Answer
10	What is the use of the useHistory hook in React Router?	Show Answer
11	How do you pass parameters to routes in React Router?	Show Answer
12	What is the use of the useParams hook in React Router?	Show Answer
13	How do you handle nested routes in React Router?	Show Answer
14	What is the use of the Switch component in React Router?	Show Answer
15	How do you implement route guards in React Router?	Show Answer
16	What is the Redirect component in React Router?	Show Answer
17	How do you handle 404 pages in React Router?	Show Answer
18	What is the use of the useRouteMatch hook in React Router?	Show Answer
19	How do you implement dynamic routing in React Router?	Show Answer
20	How do you handle query parameters in React Router?	Show Answer
21	What is the use of the withRouter higher-order component in React Router?	Show Answer
22	How do you handle transitions between routes in React Router?	Show Answer
23	How do you optimize routing for large applications in React Router?	Show Answer
24	What is the use of the StaticRouter component in React Router?	Show Answer
25	How do you integrate React Router with Redux?	Show Answer
No.	Title	Show Answer
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1	What is the difference between React and ReactDOM, and when should you use each?	Show Answer
2	How do you use ReactDOM to render a React component into the DOM?	Show Answer
3	What are the differences between class components and functional components in React?	Show Answer
4	When should you use class components over functional components, and vice versa?	Show Answer
5	What is the difference between useState and useReducer hooks in React?	Show Answer
6	When should you use useState instead of useReducer, and vice versa?	Show Answer
7	What is the difference between useEffect and useLayoutEffect hooks in React?	Show Answer
8	When should you use useEffect over useLayoutEffect, and vice versa?	Show Answer
9	What is the difference between useMemo and useCallback hooks in React?	Show Answer
10	When should you use useMemo instead of useCallback, and vice versa?	Show Answer
11	What are the differences between Context API and Redux for state management in React?	Show Answer
12	When should you use Context API over Redux, and vice versa?	Show Answer
13	What are the differences between React and React Native?	Show Answer
14	When should you use React Native instead of React, and vice versa?	Show Answer
15	What are the differences between Next.js and Create React App for building React applications?	Show Answer
16	When should you use Next.js over Create React App, and vice versa?	Show Answer
17	What are the differences between React Router and Reach Router for routing in React applications?	Show Answer
18	When should you use React Router instead of Reach Router, and vice versa?	Show Answer
19	What are the differences between React Testing Library and Enzyme for testing React components?	Show Answer
20	When should you use React Testing Library over Enzyme, and vice versa?	Show Answer
21	What are the differences between styled-components and CSS Modules for styling React components?	Show Answer
22	When should you use styled-components instead of CSS Modules, and vice versa?	Show Answer
23	What is the difference between the useContext hook and Redux for state management?	Show Answer
24	When should you use useContext instead of Redux, and vice versa?	Show Answer
25	What is the difference between the useRef and createRef hooks in React?	Show Answer
26	When should you use useRef instead of createRef, and vice versa?	Show Answer
27	What are the differences between server-side rendering (SSR) and client-side rendering (CSR) in React?	Show Answer
28	When should you use server-side rendering over client-side rendering, and vice versa?	Show Answer
29	What is the difference between static site generation (SSG) and server-side rendering (SSR) in Next.js?	Show Answer
30	When should you use static site generation instead of server-side rendering, and vice versa?	Show Answer
31	What is the difference between React.memo and useMemo for performance optimization in React?	Show Answer
32	When should you use React.memo instead of useMemo, and vice versa?	Show Answer
33	What are the differences between prop drilling and useContext/useReducer for passing props in React?	Show Answer
34	When should you use prop drilling over useContext/useReducer, and vice versa?	Show Answer
35	What is the difference between React.PureComponent and functional components with React.memo?	Show Answer
36	When should you use React.PureComponent instead of functional components with React.memo, and vice versa?	Show Answer
37	What are the differences between React.Fragment and the <> </> syntax in React?	Show Answer
38	When should you use React.Fragment over the <> </> syntax, and vice versa?	Show Answer
39	What is the difference between PropTypes and TypeScript for type checking in React?	Show Answer
40	When should you use PropTypes instead of TypeScript, and vice versa?	Show Answer
41	What is the difference between React.Children and Array.prototype.map in React?	Show Answer
42	When should you use React.Children instead of Array.prototype.map, and vice versa?	Show Answer
43	What are the differences between useRef and useState in React?	Show Answer
44	When should you use useRef instead of useState, and vice versa?	Show Answer
45	What is the difference between React.lazy and Suspense for code splitting in React?	Show Answer
46	When should you use React.lazy instead of Suspense, and vice versa?	Show Answer
47	What are the differences between React.memo and shouldComponentUpdate for performance optimization in React?	Show Answer
48	When should you use React.memo instead of shouldComponentUpdate, and vice versa?	Show Answer
49	What is the difference between React.Children.map and React.Children.forEach in React?	Show Answer
50	When should you use React.Children.map instead of React.Children.forEach, and vice versa?	Show Answer
51	What are the differences between controlled and uncontrolled components in React?	Show Answer
52	When should you use controlled components over uncontrolled components, and vice versa?	Show Answer
53	What is the difference between keys and refs in React?	Show Answer
54	When should you use keys instead of refs, and vice versa?	Show Answer
55	What are the differences between PureComponent and Component in React?	Show Answer
56	When should you use PureComponent over Component, and vice versa?	Show Answer
57	What is the difference between the key prop and the ref attribute in React?	Show Answer
58	When should you use the key prop instead of the ref attribute, and vice versa?	Show Answer
59	What are the differences between forwardRef and useRef in React?	Show Answer
60	When should you use forwardRef instead of useRef, and vice versa?	Show Answer
61	What is the difference between the children prop and the React.Children.map function in React?	Show Answer
62	When should you use the children prop instead of the React.Children.map function, and vice versa?	Show Answer
63	What are the differences between shallow rendering and full DOM rendering in Enzyme?	Show Answer
64	When should you use shallow rendering over full DOM rendering, and vice versa?	Show Answer
65	What is the difference between Enzyme and React Testing Library for testing React components?	Show Answer
66	When should you use Enzyme instead of React Testing Library, and vice versa?	Show Answer
67	What are the differences between Redux Thunk and Redux Saga for handling async actions in Redux?	Show Answer
68	When should you use Redux Thunk over Redux Saga, and vice versa?	Show Answer
69	What is the difference between localStorage and sessionStorage in HTML5?	Show Answer
70	When should you use localStorage instead of sessionStorage, and vice versa?	Show Answer
71	What are the differences between a functional component and a class component in React?	Show Answer
72	When should you use a functional component over a class component, and vice versa?	Show Answer
73	What is the difference between the debounce and throttle techniques in JavaScript?	Show Answer
74	When should you use debounce instead of throttle, and vice versa?	Show Answer
75	What are the differences between var, let, and const in JavaScript?	Show Answer
76	When should you use var instead of let or const, and vice versa?	Show Answer
77	What is the difference between event bubbling and event capturing in JavaScript?	Show Answer
78	When should you use event bubbling instead of event capturing, and vice versa?	Show Answer
79	What are the differences between deep copy and shallow copy in JavaScript?	Show Answer
80	When should you use deep copy instead of shallow copy, and vice versa?	Show Answer

Styled Components

No.	Title	Show Answer
1	What are styled-components in React?	Show Answer
2	How do you set up styled-components in a React application?	Show Answer
3	What is the advantage of using styled-components over traditional CSS?	Show Answer
4	How do you create a basic styled component?	Show Answer
5	How do you pass props to styled-components?	Show Answer
6	What is the purpose of the css helper in styled-components?	Show Answer
7	How do you handle theme management with styled-components?	Show Answer
8	What is the ThemeProvider component in styled-components?	Show Answer
9	How do you define global styles with styled-components?	Show Answer
10	How do you create dynamic styles based on props with styled-components?	Show Answer
11	How do you style child components using styled-components?	Show Answer
12	What are keyframes in styled-components, and how do you use them?	Show Answer
13	How do you perform conditional styling with styled-components?	Show Answer
14	How do you use media queries in styled-components?	Show Answer
15	How do you use styled-components with TypeScript?	Show Answer
16	What is the extend syntax in styled-components?	Show Answer
17	How do you handle nesting in styled-components?	Show Answer
18	What is the use of the attrs method in styled-components?	Show Answer
19	How do you handle server-side rendering with styled-components?	Show Answer
20	How do you optimize styled-components for better performance?	Show Answer
21	How do you use the StyleSheetManager component in styled-components?	Show Answer
22	How do you handle CSS resets with styled-components?	Show Answer
23	How do you integrate styled-components with existing CSS frameworks?	Show Answer
24	How do you debug issues in styled-components?	Show Answer
25	How do you handle animations in styled-components?	Show Answer

Axios

No.	Title	Show Answer
1	What is Axios, and why is it used in React applications?	Show Answer
2	How do you set up Axios in a React application?	Show Answer
3	How do you perform a GET request with Axios?	Show Answer
4	How do you perform a POST request with Axios?	Show Answer
5	How do you handle request and response interceptors in Axios?	Show Answer
6	How do you handle errors with Axios?	Show Answer
7	How do you cancel requests with Axios?	Show Answer
8	How do you handle concurrent requests with Axios?	Show Answer
9	How do you set default headers in Axios?	Show Answer
10	How do you handle file uploads with Axios?	Show Answer
11	How do you handle authentication with Axios?	Show Answer
12	How do you use Axios with TypeScript?	Show Answer
13	What are some best practices for using Axios in React applications?	Show Answer
14	How do you integrate Axios with React Query?	Show Answer
15	How do you use Axios with Redux Toolkit?	Show Answer
16	How do you perform request retries with Axios?	Show Answer
17	How do you handle pagination with Axios?	Show Answer
18	How do you handle large file downloads with Axios?	Show Answer
19	How do you use Axios with React Native?	Show Answer
20	How do you handle response transformations with Axios?	Show Answer

Webpack

No.	Title	Show Answer
1	What is Webpack?	Show Answer
2	What are the main features of Webpack?	Show Answer
3	How do you set up a basic Webpack configuration?	Show Answer
4	What is the purpose of entry points in Webpack?	Show Answer
5	What is the purpose of output in Webpack?	Show Answer
6	How do you handle different file types in Webpack?	Show Answer
7	What are loaders in Webpack?	Show Answer
8	What are plugins in Webpack?	Show Answer
9	How do you use the HtmlWebpackPlugin in Webpack?	Show Answer
10	What is the purpose of the CleanWebpackPlugin in Webpack?	Show Answer
11	How do you handle CSS in Webpack?	Show Answer
12	What is the use of the MiniCssExtractPlugin in Webpack?	Show Answer
13	How do you handle images and fonts in Webpack?	Show Answer
14	What is code splitting in Webpack?	Show Answer
15	How do you implement code splitting in Webpack?	Show Answer
16	What is the purpose of the SplitChunksPlugin in Webpack?	Show Answer
17	How do you optimize the build process in Webpack?	Show Answer
18	What is the use of the DefinePlugin in Webpack?	Show Answer
19	How do you handle environment variables in Webpack?	Show Answer
20	What is the purpose of the HotModuleReplacementPlugin in Webpack?	Show Answer
21	How do you set up hot module replacement in Webpack?	Show Answer
22	How do you use the Webpack DevServer?	Show Answer
23	What are source maps, and how do you configure them in Webpack?	Show Answer
24	How do you handle tree shaking in Webpack?	Show Answer
25	How do you optimize the performance of a Webpack build?	Show Answer
26	What is the purpose of the BundleAnalyzerPlugin in Webpack?	Show Answer
27	How do you handle multiple entry points in Webpack?	Show Answer
28	What is the difference between development and production mode in Webpack?	Show Answer
29	How do you configure Webpack for a React application?	Show Answer
30	How do you handle polyfills in Webpack?	Show Answer

Testing

No.	Title	Show Answer
1	What is unit testing?	Show Answer
2	What are the main libraries used for testing React applications?	Show Answer
3	What is Jest?	Show Answer
4	How do you set up Jest for a React application?	Show Answer
5	What is the purpose of a test runner?	Show Answer
6	What is the purpose of a test suite?	Show Answer
7	What is a test case?	Show Answer
8	What is the difference between a test case and a test suite?	Show Answer
9	How do you write a basic test case in Jest?	Show Answer
10	What is the use of the describe function in Jest?	Show Answer
11	How do you perform assertions in Jest?	Show Answer
12	What is the purpose of the expect function in Jest?	Show Answer
13	How do you mock functions in Jest?	Show Answer
14	What is the use of the beforeEach and afterEach functions in Jest?	Show Answer
15	How do you test asynchronous code in Jest?	Show Answer
16	What is the purpose of the mockImplementation function in Jest?	Show Answer
17	How do you test React components using the React Testing Library?	Show Answer
18	What is the use of the render function in the React Testing Library?	Show Answer
19	How do you perform queries in the React Testing Library?	Show Answer
20	What is the purpose of the fireEvent function in the React Testing Library?	Show Answer
21	How do you test user interactions in the React Testing Library?	Show Answer
22	What is snapshot testing?	Show Answer
23	How do you perform snapshot testing in Jest?	Show Answer
24	What is the purpose of the toMatchSnapshot function in Jest?	Show Answer
25	How do you mock API calls in Jest?	Show Answer
26	What is the use of the axios-mock-adapter library?	Show Answer
27	How do you test Redux actions and reducers?	Show Answer
28	How do you test React components connected to Redux?	Show Answer
29	What is end-to-end (E2E) testing?	Show Answer
30	What are the main tools used for E2E testing in React applications?	Show Answer
31	What is Cypress?	Show Answer
32	How do you set up Cypress for a React application?	Show Answer
33	How do you write a basic E2E test in Cypress?	Show Answer
34	What is the use of the cy.visit function in Cypress?	Show Answer
35	How do you perform assertions in Cypress?	Show Answer
36	How do you test form interactions in Cypress?	Show Answer
37	What is the purpose of the cy.intercept function in Cypress?	Show Answer
38	How do you mock API responses in Cypress?	Show Answer
39	What are some best practices for testing React applications?	Show Answer
40	How do you handle test coverage in Jest?	Show Answer
41	What is the use of the jest-coverage-badges library?	Show Answer
42	How do you generate test coverage reports in Jest?	Show Answer
43	How do you perform visual regression testing in React applications?	Show Answer
44	What is the purpose of the Percy library?	Show Answer
45	How do you integrate Percy with a React application?	Show Answer

React Testing Library

No.	Title	Show Answer
1	What is React Testing Library, and how does it differ from Enzyme?	Show Answer
2	How do you set up React Testing Library in a React application?	Show Answer
3	What is the purpose of the render function in React Testing Library?	Show Answer
4	How do you query for elements in React Testing Library?	Show Answer
5	What is the difference between getBy, queryBy, and findBy queries?	Show Answer
6	How do you test asynchronous behavior in React Testing Library?	Show Answer
7	What is the use of the screen object in React Testing Library?	Show Answer
8	How do you handle user interactions in React Testing Library?	Show Answer
9	What is the use of the fireEvent function in React Testing Library?	Show Answer
10	How do you simulate events using the userEvent library?	Show Answer
11	How do you test form submissions in React Testing Library?	Show Answer
12	What is the role of the waitFor function in React Testing Library?	Show Answer
13	How do you handle mocking in React Testing Library?	Show Answer
14	What is the purpose of the act function in React Testing Library?	Show Answer
15	How do you test custom hooks using React Testing Library?	Show Answer
16	What are some best practices for writing tests with React Testing Library?	Show Answer
17	How do you test component rendering based on props in React Testing Library?	Show Answer
18	How do you test context usage in React components with React Testing Library?	Show Answer
19	How do you test components that use React portals with React Testing Library?	Show Answer
20	How do you handle setup and teardown in React Testing Library tests?	Show Answer
21	How do you test components that rely on window size or media queries with React Testing Library?	Show Answer
22	How do you test React components with Redux using React Testing Library?	Show Answer
23	How do you test React Router components with React Testing Library?	Show Answer
24	How do you test for accessibility compliance using React Testing Library?	Show Answer
25	How do you configure custom queries in React Testing Library?	Show Answer

Formik

No.	Title	Show Answer
1	What is Formik, and why is it used in React applications?	Show Answer
2	How do you set up Formik in a React application?	Show Answer
3	How do you create a basic form using Formik?	Show Answer
4	What is the use of the Formik component?	Show Answer
5	How do you handle form state with Formik?	Show Answer
6	What is the use of the useFormik hook?	Show Answer
7	How do you handle form submission in Formik?	Show Answer
8	How do you perform form validation with Formik?	Show Answer
9	What is the difference between synchronous and asynchronous validation in Formik?	Show Answer
10	How do you use Yup for schema-based validation with Formik?	Show Answer
11	How do you handle custom validation in Formik?	Show Answer
12	What is the use of the Field component in Formik?	Show Answer
13	How do you handle nested form fields with Formik?	Show Answer
14	How do you handle dynamic forms with Formik?	Show Answer
15	What is the use of the FieldArray component in Formik?	Show Answer
16	How do you handle complex form interactions with Formik?	Show Answer
17	How do you reset the form state in Formik?	Show Answer
18	How do you handle field-level validation with Formik?	Show Answer
19	How do you integrate Formik with Material-UI?	Show Answer
20	How do you handle file uploads with Formik?	Show Answer
21	How do you handle form submission errors with Formik?	Show Answer
22	How do you access form values and errors programmatically in Formik?	Show Answer
23	What are some best practices for using Formik in large forms?	Show Answer
24	How do you optimize Formik for better performance?	Show Answer
25	How do you use Formik with React Native?	Show Answer

React Query

No.	Title	Show Answer
1	What is React Query, and why is it used in React applications?	Show Answer
2	How do you set up React Query in a React application?	Show Answer
3	What is the use of the useQuery hook in React Query?	Show Answer
4	How do you handle data fetching with React Query?	Show Answer
5	What is the use of the QueryClient in React Query?	Show Answer
6	How do you manage cache with React Query?	Show Answer
7	How do you handle background data synchronization with React Query?	Show Answer
8	How do you handle pagination with React Query?	Show Answer
9	How do you handle infinite scrolling with React Query?	Show Answer
10	What is the use of the useMutation hook in React Query?	Show Answer
11	How do you handle optimistic updates with React Query?	Show Answer
12	How do you manage dependent queries in React Query?	Show Answer
13	What is the use of the QueryCache in React Query?	Show Answer
14	How do you handle error handling with React Query?	Show Answer
15	How do you perform query invalidation in React Query?	Show Answer

Storybook

No.	Title	Show Answer
1	What is Storybook, and why is it used in React applications?	Show Answer
2	How do you set up Storybook in a React application?	Show Answer
3	What is the purpose of stories in Storybook?	Show Answer
4	How do you create a basic story in Storybook?	Show Answer
5	How do you use addons in Storybook?	Show Answer
6	What is the use of the Knobs addon in Storybook?	Show Answer
7	How do you handle actions in Storybook?	Show Answer
8	How do you use the Controls addon in Storybook?	Show Answer
9	How do you handle component documentation in Storybook?	Show Answer
10	What is the use of the Docs addon in Storybook?	Show Answer
11	How do you handle themes in Storybook?	Show Answer
12	How do you use Storybook with TypeScript?	Show Answer
13	How do you integrate Storybook with existing component libraries?	Show Answer
14	What are some best practices for organizing stories in Storybook?	Show Answer
15	How do you use Storybook with CSS-in-JS libraries?	Show Answer
16	How do you handle accessibility testing in Storybook?	Show Answer
17	How do you use the A11y addon in Storybook?	Show Answer
18	How do you handle performance testing in Storybook?	Show Answer
19	How do you use the Storysource addon in Storybook?	Show Answer
20	How do you use Storybook with Jest for snapshot testing?	Show Answer
21	How do you deploy Storybook to a static site?	Show Answer
22	How do you use Storybook with CI/CD pipelines?	Show Answer
23	How do you handle visual regression testing in Storybook?	Show Answer
24	How do you use the Chromatic tool with Storybook?	Show Answer
25	How do you debug issues in Storybook?	Show Answer
26	How do you use Storybook with different frameworks (e.g., Vue, Angular)?	Show Answer
27	How do you handle internationalization in Storybook?	Show Answer
28	How do you use Storybook with design systems?	Show Answer
29	How do you optimize Storybook for better performance?	Show Answer
30	How do you handle versioning and release management with Storybook?	Show Answer

React Hook Form

No.	Title	Show Answer
1	What is React Hook Form, and why is it used in React applications?	Show Answer
2	How do you set up React Hook Form in a React application?	Show Answer
3	How do you create a basic form using React Hook Form?	Show Answer
4	What is the use of the useForm hook in React Hook Form?	Show Answer
5	How do you handle form state with React Hook Form?	Show Answer
6	How do you handle form validation with React Hook Form?	Show Answer
7	What is the purpose of the register function in React Hook Form?	Show Answer
8	How do you handle custom validation in React Hook Form?	Show Answer
9	How do you perform schema-based validation with Yup in React Hook Form?	Show Answer
10	How do you handle form submission in React Hook Form?	Show Answer
11	How do you reset the form state in React Hook Form?	Show Answer
12	How do you handle nested fields in React Hook Form?	Show Answer
13	What is the use of the Controller component in React Hook Form?	Show Answer
14	How do you integrate React Hook Form with Material-UI?	Show Answer
15	How do you handle dynamic forms with React Hook Form?	Show Answer
16	How do you handle dependent fields in React Hook Form?	Show Answer
17	How do you handle file uploads with React Hook Form?	Show Answer
18	How do you use React Hook Form with TypeScript?	Show Answer
19	What are some best practices for using React Hook Form?	Show Answer
20	How do you handle form-level validation in React Hook Form?	Show Answer
21	How do you access form values and errors programmatically in React Hook Form?	Show Answer
22	How do you handle form persistence with React Hook Form?	Show Answer
23	How do you handle default values in React Hook Form?	Show Answer
24	How do you integrate React Hook Form with Redux?	Show Answer
25	How do you optimize forms for better performance with React Hook Form?	Show Answer

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