Critical Rendering Path and Browser Rendering Process Questions

Understand how browsers render web pages: DOM construction, CSSOM construction, render tree creation, layout, painting, and compositing. Understand which resources block rendering (render-blocking CSS and JavaScript). Know how to identify the critical rendering path for a specific page. Understand the impact of different loading strategies - inline vs external, async vs defer. Know about resource priorities and how browsers handle them. Discuss how to minimize the critical rendering path and impact of non-critical resources. This knowledge is fundamental to all frontend performance optimization.