Clarify requirements and define constraints (e.g., number of users, data volume).
System design interviews (SDI) are widely considered the most challenging part of the hiring process for mid-to-senior level engineering roles at FAANG companies (Facebook/Meta, Amazon, Apple, Netflix, Google) and major startups. Unlike coding interviews, which have a definitive correct answer, system design is open-ended.
Use virtual whiteboards like Excalidraw or Miro to practice mock interviews under strict time limits.
