What is the Virtual DOM in React and how does it work?

Interview Questions

May 2026

What is the Virtual DOM in React and how does it work?

The Virtual DOM is a lightweight in-memory representation of the real DOM. React uses it....

What is the difference between useState and useRef in React?

Interview Questions

May 2026

What is the difference between useState and useRef in React?

useState triggers a re-render when updated, while useRef holds a mutable value that persists across....