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6 year of experience
System Design
Importance 0
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Practice Questions
Where should a URL shortener cache frequently accessed short_code to long_url mappings for...
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Why should a URL shortener maintain an index or primary key on the short_code column?
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A short URL has expired. What should the redirect service ideally return when the short co...
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Why is Base62 commonly used for short URL codes instead of Base64?
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Which short-code generation strategy best guarantees uniqueness without collision checks f...
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Why is using the first few characters of the long URL as the short code a bad approach?
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Which database constraint is most important for preventing two different long URLs from ge...
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A URL shortener has 1000 redirects for every 1 new short URL creation. What is the most im...
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