Full Stack Developer
hardcdn-and-caching-strategy
How do you use a CDN and caching to improve full stack performance?
Answer
CDNs cache static assets near users.
**Strategy:**
- Cache static assets aggressively (hashed filenames)
- Use HTTP caching headers (`Cache-Control`, `ETag`)
- Cache SSR/HTML selectively when safe
- Add API caching where appropriate (Redis)
**Interview tip:** explain cache invalidation via content hashing for assets and careful TTL for dynamic data.
Related Topics
PerformanceCachingCDN