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Databases and caching
Frontend Developer
Databases and caching questions
21 questions on Databases and caching for frontend developers, easiest first.
Easy
5
no-cache versus no-store
easy
What a 304 response means
easy
Unit of max-age
easy
Main benefit of a CDN
easy
What Vary does
easy
Medium
8
Page not restored on Back
medium
stale-while-revalidate
medium
Caching the HTML page
medium
Origin load from hit ratio
medium
Low CDN hit ratio
medium
Changing a file at the same URL
medium
Polling an API that rarely changes
medium
Serving AVIF from one URL
medium
Hard
8
Old version after deploy with a service worker
hard
High TTFB only in the Gulf
hard
No Cache-Control header
hard
User data cached at the CDN
hard
Vary: User-Agent at the CDN
hard
Version in a query string
hard
Origin outage resilience
hard
Many edges hitting the origin
hard
