Discuss caching mechanisms available in next js?

0-2 years experience

1. 1You need to pre‑render a blog post that rarely changes. Which Next.js caching feature would you pick and how would you set it up?
2. 2If you add a `Cache-Control: max-age=0, must-revalidate` header to a page, what effect does it have on the browser and Vercel edge cache?

2-5 years experience

1. 1The product team wants the homepage to refresh its data every 10 minutes without redeploying. How would you achieve that with Next.js caching, and what trade‑offs are you making?
2. 2During a load test you notice an API route recomputes its response on every request. Walk me through how you would add caching to that route and verify it works.

5-8 years experience

1. 1Design a caching strategy for a multi‑tenant SaaS dashboard built with Next.js that serves public marketing pages and private user data, considering ISR, edge caching, and server‑side fetching.
2. 2Stale data is being served from Vercel’s edge cache after a recent database migration. How would you diagnose the issue and correct the caching configuration?
3. 3Compare ISR with on‑demand revalidation for a high‑traffic news site. Discuss performance, cost, and data‑freshness implications.

8+ years experience

1. 1Our organization is consolidating several legacy Node services into a Next.js monorepo. How would you define a unified caching policy that balances SEO, data freshness, and cross‑team deployment cadence?
2. 2When scaling to global traffic, what architectural changes would you propose for Next.js caching layers (edge, CDN, server) to minimize latency while keeping data consistent across regions?
3. 3We currently use a custom Redis cache for server‑side data. How would you evaluate migrating to Next.js built‑in caching primitives without breaking existing contracts?