After a release, Core Web Vitals dropped in production, primarily INP and LCP. How would you find the cause, and what do you usually end up fixing?
~4 min by voice
How to approach it
They're checking whether the candidate can systematically investigate a performance regression on real users: understands exactly what LCP and INP measure, tells field data from lab data, finds the cause through attribution and knows the typical fixes, rather than just "following Lighthouse's advice".
The interviewer will ask this question and listen. Think out loud and ask for a hint if you need one. When you're done, pause or tap “That's my answer”. In about a minute, your score and the points you covered show up here.