Hi everyone, so I\'m preparing for interviews at FAANG companies and FYI I do not have a Computer Science background (majored in Economics) been an engineer for a few years now. I have learned a lot about the process and one thing that I find particularly unclear at the moment is the Back of The Envelope Calculations. I found a few resources but some of the numbers and figures you\'re expected to know I can\'t ake sense of yet. Like the ones found here :\n* http://highscalability.com/blog/2011/1/26/google-pro-tip-use-back-of-the-envelope-calculations-to-choo.html\n* https://medium.com/workindia-in/back-of-the-envelope-calculations-stay-one-step-ahead-while-designing-system-architectures-cfe78691c79e\n* https://github.com/donnemartin/system-design-primer#powers-of-two-table\n\nHow do I make sense of these calculations? What prerequisite knowledge do I need to understand how to calculate systems requirements in a few minutes? Are there any resources that explain this in very granular details? What are ns, us measuements? What should I now about latency ? Please anything helps! :)

Hi everyone, so I\'m preparing for interviews at FAANG companies and FYI I do not have a Computer Science background (majored in Economics) been an engineer for