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

301. How would you evaluate whether a React architecture is becoming operationally unsustainable?

302. What signals indicate frontend platform fragmentation in React ecosystems?

303. How do you balance React framework conventions with organizational flexibility?

304. How would you define architectural fitness functions for React applications?

305. What governance models best support large React engineering organizations?

306. How would you prevent abstraction overengineering in React systems?

307. What are the tradeoffs between reusable libraries and application autonomy?

308. How do large organizations coordinate React framework upgrades safely?

309. How would you design organization-wide React engineering standards?

310. What operational risks arise from fragmented React tooling ecosystems?