Free mini course
Back of the Envelope Math in the First Five Minutes of a System Design Interview
100 million daily users, 20 requests each. Can you turn that into QPS before the interviewer finishes their coffee?
Back of the envelope estimation is the first thing senior engineers do in a system design interview, and it is one of the first things that separates a confident answer from a hesitant one. This Short walks through the mental math out loud: DAU to requests per day, requests per day to QPS, and how to sanity check your numbers without a calculator.
You will also see how capacity m
Watch on YouTube100 million daily users, 20 requests each. Can you turn that into QPS before the interviewer finishes their coffee?
Back of the envelope estimation is the first thing senior engineers do in a system design interview, and it is one of the first things that separates a confident answer from a hesitant one. This Short walks through the mental math out loud: DAU to requests per day, requests per day to QPS, and how to sanity check your numbers without a calculator.
You will also see how capacity m
Frequently asked questions
What is Back of the Envelope Math in the First Five Minutes of a System Design Interview about?
100 million daily users, 20 requests each. Can you turn that into QPS before the interviewer finishes their coffee?
Which topics does this mini course relate to?
System Design, Tech Interview Preparation.