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

361. What trust-boundary concerns exist in federated React architectures?

362. How do CSP strategies interact with modern React rendering patterns?

363. How would you prevent supply-chain attacks in React organizations?

364. What dependency-governance practices are essential in enterprise React ecosystems?

365. How do React applications securely handle sensitive client-side workflows?

366. How would you architect React systems for regulated industries like healthcare or finance?

367. What auditability concerns exist in enterprise React platforms?

368. How would you implement tamper-evident telemetry in React systems?

369. How do privacy regulations affect analytics integrations in React applications?

370. How would you design consent-aware telemetry architectures in React ecosystems?