FrontendFull-StackAround since 2020
Incremental Static Regeneration
Also written as ISR, On-Demand Revalidation
A Next.js feature that serves pre-built static pages but rebuilds individual pages in the background when their data changes, so a large site gets static speed without rebuilding everything on each update.
Think of it like
A printed catalogue where individual pages get quietly reprinted when a price changes, instead of reprinting the whole book.
Junior or senior?
Signals real Next.js production work on content-heavy sites (e-commerce, media).
Senior sounds like
Talks about stale content and how updates were triggered.
Ask them
“How did you make sure users didn't see stale data after something changed?”