#cdn

5 cdn interview questions, asked at Amazon, Google, Meta and 5 more companies. Last asked Sep 2026.

Design a global caching service for small imagesSystem designDesign a global caching service for small images, backed by a single database that holds every image and is the source of truth. Cover the read path, the update path, the cache…
Last asked Sep 2026
Design a content delivery networkSystem designDesign a CDN that serves static content from servers close to users. Cover how a request reaches the nearest edge, what the edge caches and for how long, cache misses and the path…
Last asked Sep 2026
+6
Design YouTubeSystem designUpload videos, transcode them into many formats, and stream them worldwide with adaptive bitrate, along with views, likes and comments.
Last asked Aug 2026
+3
Design SpotifySystem designStream music to hundreds of millions of listeners: catalog, search, playlists, smooth playback over bad networks, and offline downloads.
Last asked May 2026
+4
Design InstagramSystem designUsers post photos and videos, follow each other and scroll a feed; design upload, storage, feed generation and serving media worldwide.
Last asked May 2026