CSS (Cascading Style Sheets) is used to style and layout HTML elements, controlling colors, fonts, spacing, positioning, and responsive design.

What is the CSS Box Model?

The Box Model consists of content, padding, border, and margin. It defines the space around HTML elements and how they are calculated for sizing.

Flexbox is a CSS layout module that provides an efficient way to arrange, distribute, and align items in one-dimensional layouts with flexible sizing.

CSS Interview Questions

321. How do CSS deployment pipelines interact with browser caching behavior?

322. How would you optimize CSS delivery for globally distributed low-bandwidth users?

323. What are advanced CSS streaming and prioritization strategies?

324. How do HTTP/2 and HTTP/3 influence CSS loading patterns?

325. How would you design CSS systems resilient to partial network failures?

326. What are offline-first considerations for CSS delivery?

327. How do service workers influence stylesheet caching strategies?

328. What stale-style issues occur in offline-capable applications?

329. How would you architect resilient theme switching in offline environments?

330. How do browser rendering engines internally optimize CSS selector matching?