Introduction
React is a popular JavaScript library for building user interfaces, and as a result, it is frequently used in job interviews for front-end developers. If you are preparing for a React interview, it is important to familiarize yourself with the common questions and concepts that are likely to come up. In this blog post, we will provide an overview of the React interview process, including tips for success and a list of common interview questions.
Whether you are a seasoned developer looking to brush up on your React knowledge or a newcomer to the field, this post will help you feel confident and prepared for your upcoming React interview.
Basic Level
1. What are the main features of React?
2. What is JSX?
3. Can web browsers read JSX directly?
4. What is the virtual DOM?
5. What is difference between React and Angular?
5. What is an event and how to create it in React?
6. What are synthetic events in React?
7. Why is there a need for using keys in Lists?
8. What are forms in React?
9. What are the components in React and with are differences?
10. What is render() in React?
11. What is a state in React?
12. What are props in React?
13. What are the differences between state and props?
14. What is a higher-order component in React?
15. What are hooks React?
16. What is the use of useEffect React Hooks?
17. What is the use of refs in React?
Intermediate Level
18. What is Context in React?
19. What is Babel in React js?
20. What is the main difference between createElement and cloneElment?
21. Explain the lifecycle methods of components
22. What are the different phases of ReactJS component lifecycle?
23. What is the difference between Shadow DOM and Virtual DOM?
24. Why we should not update state directly?
25. What is React Router?
26. What is Redux?
27. What are components in Redux?
28. What is Flux?
Advanced Level
29. Does React useState Hook update immediately?
30. What is prop drilling and how can you avoid it?
31. What is Strict Mode in React?
32. Name a few techniques to optimize React app performance?
33. Can React Hook replaces Redux?
Conclusion
In conclusion, React is a popular and widely-used JavaScript library for building user interfaces. It is used by many companies and developers for building web and mobile applications due to its efficiency and flexibility. Familiarizing yourself with common React interview questions and practicing your responses can help you prepare for a job interview in this field. It is also important to have a strong understanding of React concepts such as the virtual DOM, components, and state management, as well as knowledge of related technologies such as JSX and Redux. By demonstrating your knowledge of React and related technologies, you can increase your chances of success in a React job interview.