Top 25 React Interview Questions and Answers for 2026

Top 25 React Interview Questions and Answers for 2026 React is one of the most popular frontend libraries used by companies worldwide. If you're preparing for frontend interviews, these React interview questions will help you revise important concepts quickly. 1. What is React? React is a JavaScript library developed by Facebook for building user interfaces using reusable components. 2. What is Virtual DOM? Virtual DOM is a lightweight copy of the real DOM. React compares changes in the Virtual