React is a JavaScript library developed by Facebook for building user interfaces using reusable components and a virtual DOM for efficient rendering.

What are React hooks?

Hooks are functions that allow you to use state and lifecycle features in functional components. Common hooks include useState, useEffect, useContext, and useReducer.

What is the virtual DOM?

The virtual DOM is an in-memory representation of the real DOM. React uses it to determine what changes need to be made and updates only those parts in the actual DOM efficiently.

React.js Interview Questions

321. How would you debug intermittent React rendering glitches in production?

322. What causes non-deterministic rendering behavior in React applications?

323. How do asynchronous race conditions emerge in React systems?

324. How would you prevent stale async data propagation in React?

325. What consistency issues occur during optimistic UI updates?

326. How would you reconcile conflicting updates in collaborative React systems?

327. How do React applications support eventual consistency patterns?

328. How would you synchronize distributed client-side state across React applications?

329. How do websocket-driven interfaces affect React rendering stability?

330. How would you optimize React dashboards handling high-frequency updates?