Practice Web Development interview questions covering HTML, CSS, JavaScript, React, REST APIs, web security, browser rendering, and modern framework patterns.
Web development interviews span a wide surface area — from DOM manipulation and CSS layout to REST API design, authentication, and browser security. The depth varies by role (frontend-heavy vs full-stack vs backend-API), but most interviews expect fluency in both client-side fundamentals and server-side patterns.
Master the browser and rendering fundamentals: the critical rendering path (parsing HTML, constructing the DOM and CSSOM, layout, paint, composite), event loop architecture (call stack, callback queue, microtask queue, Web APIs), and browser storage APIs (localStorage, sessionStorage, IndexedDB, cookies and their security attributes). For JavaScript, know closure semantics, prototypal inheritance vs ES6 class syntax, event delegation, the module system (CommonJS vs ESM), and asynchronous patterns (callbacks, Promises, async/await, pitfalls of Promise.all vs Promise.allSettled vs Promise.race). For REST API design, understand resource naming, idempotency, HTTP method semantics, status codes, and versioning strategies.
Web security is increasingly tested: OWASP Top 10 (especially XSS, CSRF, injection), Content Security Policy, CORS misconfiguration, and authentication patterns (session cookies with httpOnly/Secure flags vs JWT storage trade-offs). Modern framework questions (React component lifecycle, state management patterns, SSR vs CSR vs SSG) are standard for frontend-heavy roles. Use the Top 50 Web Development Interview Questions to practise complete answers covering both the technical mechanism and the security or performance implication.
