(1–2 weeks of prep). Then move to:
| Goal | Better than Alex Xu PDF | |------|------------------------| | | Alex Xu is already fine — supplement with Grokking the System Design Interview (Educative) | | Senior/staff (L5+) | Designing Data-Intensive Applications (Kleppmann) + System Design Interview – An Insider’s Guide: Vol 2 (still Alex Xu, but more depth) | | Practice with real feedback | HelloInterview (paid mock interviews) or Pramp (free peer) | | Hands-on system building | GitHub’s system-design resources (e.g., donnemartin/system-design-primer ) + build a small project (e.g., Pastebin clone) | | Video + whiteboard style | Jordan has no life (YouTube) or Gaurav Sen (more depth than Alex Xu) | | Latest trends (2024–2026) | ByteByteGo’s paid course (updated more often than PDF) or System Design Fight Club (newsletter) | alex lu system design interview pdf better
“Alex, why Cassandra over DynamoDB? Remember the 10k budget. Dynamo’s read capacity units will bankrupt you at this scale.” (1–2 weeks of prep)
: It is much denser than Alex Xu’s guides and serves better as a long-term reference . 2. Interactive and Updated Platforms (Active Learning) Dynamo’s read capacity units will bankrupt you at