FermiReps: System Design

Practice the engineering estimates that come up in system-design interviews. FermiReps gives you focused drills in QPS, storage, bandwidth, and capacity so you can work on turning large numbers into useful estimates. SHOW YOUR REASONING Work through a question in your own words. Break it into smaller parts, state your assumptions, track units, and use rough arithmetic to reach an estimate. PRACTICE ENGINEERING QUANTITIES Convert daily traffic into requests per second. Estimate how much data a system stores or transfers. Work through capacity questions and compare the scale of your answer with the scenario. GET FEEDBACK ON YOUR WORK Submit your reasoning for AI-generated grading and feedback. Review a reference answer and worked solution to compare approaches. The focus is estimation: sensible rounding and justified assumptions matter alongside units and arithmetic. REVISIT YOUR ATTEMPTS…