#1 most askedVery commonMediumDesign interview
Design a URL shortener (like bit.ly)
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🏢 Asked in real interviews
No reports yet. Were you asked this? Be the first to say where.Design a service that turns long URLs into short links (n2d.co/aZ3x9) and redirects visitors. Assume 100M new links per month and 10× more reads than writes.
🧭 Shorten, then redirect
Client
Load balancer
API servers
Redis cache
Key-value DB
Press Next to follow a request through the system.
🎤 Answer it out loud, then check yourself
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