Frontend Engineering
Performance & Web Vitals
6 practice questions. Free questions open a full answer guide; the rest unlock with Pro.
- A page scores poorly on Cumulative Layout Shift. How would you go about diagnosing and fixing it?
- What are Core Web Vitals measuring today, and how would you go about diagnosing and improving a page that's failing one of them?Go Pro
- Field data shows your single-page app is failing the INP threshold even though its load metrics look fine. How do you explain what INP measures, and how would you go about reducing it?Go Pro
- What are Core Web Vitals, and what does each one measure?Go Pro
- A page feels sluggish when users click or type even though it loads fast. How would you reason about that as an INP problem and improve it?Go Pro
- Your team's marketing landing page is failing its LCP target in field data, and the LCP element is the hero image. Walk me through how you'd diagnose the load delay and the levers you'd pull to fix it.Go Pro
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