Grokking the System Design Interview
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What are Back-of-the-Envelope Estimations?

Back of the envelope estimations in system design interviews are like quick, rough calculations you might do on a napkin during lunch - they're not detailed or exact, but give you a good ballpark figure. These rough calculations help you quickly assess the feasibility of a proposed solution, estimate its performance, and identify potential bottlenecks.

Purpose

Back-of-the-envelope estimation is a technique used to quickly approximate values and make rough calculations using simple arithmetic and basic assumptions

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Anonymous

· 2 years ago

I thought bandwidth estimation should also consider requests per seconds. So if you 10 million users which if we can distribute over the 24 hours, and then we can get qps and then multiply that by 4mb to get the bandwidth. Other wise storage estimation and bandwidth becomes same

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