QABattle

Performance / Quiz

Core Web Vitals & Frontend Perf

LCP, CLS, INP, and the render-path knowledge to test frontend performance where users actually feel it.

Difficulty
Medium
Format
Quiz
Points
150
Estimate
8 min

// MISSION BRIEF

Your Mission

Backend p99 is only half the story, users feel the frontend. This quiz covers Core Web Vitals (LCP, CLS, INP) and the render-path fundamentals a QA engineer needs to test perceived performance.

// FIRST CONTACT

Battle teaser

Largest Contentful Paint (LCP) measures:

  1. ANumber of network requests
  2. BTime until the largest visible content element renders, a proxy for 'when does the page look loaded'
  3. CTime to first byte from the server
  4. DTotal page weight in KB
Answers, scoring, hints, and the full battle stay sealed.

// SKILL TAGS

performanceweb-vitalslcpfrontend