Performance and architecture / Q171-Q175

React Performance and Architecture APIs

React DevTools Profiler, render debugging, virtualization, large list rendering, component composition, compound components, slot APIs, portals, modals, layered UI, React Server Components, and Next.js client boundaries.

Practicing evidence-driven React performance debugging, scalable component APIs, overlays, and Next.js Server Component boundaries.

Revision Sheet

Fast review notes for this batch of senior frontend topics.

Cheat Sheet

Compact definitions, warnings, and senior-level anchors.

Mock Interview

A realistic interviewer-led sequence across the batch.

PDF Export

Printable batch pack for offline revision.

Questions Covered

Q171React DevTools Profiler and Render DebuggingOpen the full chapter, then return here for revision.Q172Virtualization and Large List RenderingOpen the full chapter, then return here for revision.Q173Component Composition, Compound Components and Slot APIsOpen the full chapter, then return here for revision.Q174React Portals, Modals and Layered UIOpen the full chapter, then return here for revision.Q175React Server Components and Client Boundaries in Next.jsOpen the full chapter, then return here for revision.