BrowseBrowse PathsPaths AI TreeAI MockMock SolveSolve PlaylistsPlaylists ListenListen

QnABox

Every IT interview answer — your way

support@qnabox.com

Interview prep for every IT job seeker

Learn

Career paths
AI learning tree
Browse questions
Mock interview
Playlists

Practice

Solve mode
Listen mode

Account

Log in
Sign up

Legal

Privacy
Terms
Contact

© 2026 QnABox. All rights reserved.

Built for job seekers · EN · हिन्दी · मराठी

Browse/Frontend/React & Next.js

Read Solve Listen

Mid-levelMid (3–6 yrs)ReactMetaUberAtlassian

startTransition for responsive UI

When should you use startTransition / useDeferredValue in React 18/19?

Answers use simple, clear English.

Your answer

Confidence

#react#concurrent#performance

RSC vs Client Components useState and useEffect