This concepts will help you understand React in depth. If you want to master React, or are looking for interview preparation resources, this series will help you, every weekend i am adding more articles to the list, each concept in depth. So do bookmark this link.

  1. React – A deep dive
  2. React – DOM and Virtual DOM
  3. React Lifecycle Methods (class components)
  4. React Hooks (functional components)
  5. React – Design Patterns & Anti Patterns

Some questions recently asked in Interviews :

  1. How does React Fiber improve performance in React applications?
  2. Explain different life cycle methods
  3. Explain the concept of reconciliation in React.
  4. Explain the concept of code splitting and its benefits in React.
  5. What are the key differences between server-side rendering (SSR) and client-side rendering (CSR) in React?
  6. Describe the concept of render props and its use cases in React.
  7. How can you optimize the rendering of large lists in React?
  8. Explain the concept of memoization and its importance in React.
  9. What is the purpose of the useEffect() hook in React and how does it work?
  10. How does React handle routing and navigation?
  11. How can you handle asynchronous operations in React using async/await?
  12. Explain the concept of the Context API in React and its benefits.
  13. What is the role of higher-order components (HOC) in React and how can you implement them?
  14. Describe the concept of controlled and uncontrolled components in React forms.
  15. How does React handle state management in large-scale applications?
  16. Explain the concept of suspense in React and its use cases.
  17. What are the different ways to handle side effects in React using hooks?
  18. How can you prevent unnecessary re-renders in React?
  19. What are the different ways to style components in React?
  20. What are the key considerations when implementing a scalable React application?
  21. Describe the concept of reusability, modularity, testablity in React components.

Important topics

  • New features introduced in React 18 Versions
  • Higher-Order Components (HOC’s) in React
  • Clear understanding of Virtual DOM
  • Prop drilling , how to avoid it
  • React Side Effects and how can we manage them ?
  • During what stages of a React Component Life Cycle, do we call Life Cycle Methods? When it is created, mounted, updated, and unmounted.
  • what is componentDidCatch
  • React Hooks