## 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.