Explain key React concepts and error handling

Frontend/React Fundamentals Questions

Answer the following React and frontend engineering questions:

1. What is a Virtual DOM?
2. How does the Virtual DOM help React? (What problems does it solve, and what are its limits?)
3. Which React Hooks have you used? Explain how/when you use them and common pitfalls.
4. What are React 18 concurrent features/hooks? Explain what “concurrent rendering” means and why it matters.
5. Server Components vs Client Components: What are they, how do they differ, and when would you choose each?
6. How do you handle errors in React? Cover rendering errors, async/data-fetch errors, and global error reporting.