Performance and Technical UI Considerations Questions

Focuses on how visual and interaction design decisions affect front end performance and engineering effort. Topics include rendering and layout costs, minimizing repaints and reflows in the Document Object Model, choosing animation techniques that use compositing friendly properties such as transforms and opacity, optimizing image formats and responsive image delivery, managing web font impact and variable font trade offs, reducing bundle size and asset weight, and strategies such as lazy loading, virtualization, and resource prioritization. Candidates should explain how to set and work within performance budgets, how to measure impact using metrics such as First Contentful Paint, Largest Contentful Paint, and Time to Interactive, and how to collaborate with engineers to balance polish, accessibility, and performance.