Design a news feed
A news feed is your social network's "For You" page. It displays your friends' updates. The System Design Interview book provides a straightforward solution without many details. Hello Interview's ver
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Posts tagged #scalability
Design a notification system
There are three main types of notifications: push, email, and SMS. They are usually 'soft' real-time, and they should support opt-outs across multiple devices per user. Pushes are routed to Apple or F
Design a web crawler
At the start we seed a few webpage which recursively add more pages from the links found on the seed pages. Uses Cases Used for search engine indexing, web archiving, web minining (scraping), web moni
Design a url shortner
A URL shortener is a proxy service that provides a mapping between the short and full representation of a URL. The short URL has the advantage of being small. The service can also provide useful analy
