HardDesign: URL Shortener (TinyURL)

A URL shortener has 100M URLs and uses MD5 hash truncated to 6 Base62 chars. What is the main risk?

— Tests your understanding of this concept.

Answer Options

AURLs are too long
BHash collisions requiring retry logic
CMD5 is too slow
DBase62 is not URL-safe

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This question is from the Design: URL Shortener (TinyURL) topic (System Design Cases).

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