Web Development Interview Questions Part 3:

21. What’s responsive design? 
    An approach where web layouts adapt fluidly to different screen sizes using flexible grids, images, and CSS media queries for a seamless experience on any device.

22. What are Web Components and why use them? 
    Self-contained, reusable custom elements with encapsulated HTML, CSS, and JS that work natively in browsers to build modular UI components.

23. What is hydration in Next.js and similar frameworks? 
    Hydration is the process where server-rendered HTML gets “activated” with JavaScript on the client side to make it interactive.

24. How do you handle SEO, UX, performance, and security in web apps?
⦁ SEO: semantic tags, metadata, sitemap, fast loading.
⦁ UX: intuitive design, responsive layout, accessibility.
⦁ Performance: optimize assets, caching, lazy loading.
⦁ Security: HTTPS, input validation, sanitize data, use Content Security Policy.

25. Describe your typical workflow for building web pages. 
    Plan layout/design → structure HTML → style with CSS → add interactivity via JavaScript → test on devices → optimize performance → deploy.

26. How do you debug and test others’ code? 
    Read documentation, replicate issues, use browser dev tools, add console logs/debuggers, write unit/integration tests, communicate with the original developer.

27. How do you ensure web accessibility? 
    Follow WCAG guidelines, use semantic HTML, provide alt text for images, ensure keyboard navigability, use ARIA roles where necessary, and test with assistive tools.

28. REST vs SOAP — what’s the difference?
⦁ REST is lightweight, uses standard HTTP methods and formats like JSON; flexible and widely used.
⦁ SOAP is protocol-based, uses XML, stricter, supports formal contracts and built-in error handling.

29. How do you troubleshoot slow loading pages? 
    Analyze with tools like Lighthouse, check network requests, optimize large assets, reduce HTTP calls, review server response times, and audit third-party scripts.

30. What strategies do you use to meet deadlines under pressure? 
    Prioritize tasks, break work into manageable chunks, communicate early if blockers arise, focus on MVP features first, and limit distractions.

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