GitHub is a code repository, but it has also become a haven for technical notes, summaries, and—controversially—copyrighted content. Searching GitHub for "system-design-interview" yields thousands of repositories.
| Method | Cost | Verified? | Notes | | :--- | :--- | :--- | :--- | | | $29.99 | ✅ Yes | DRM-protected, searchable, updates possible | | ByteByteGo website bundle | $79 (both volumes) | ✅ Yes | Includes video summaries and digital diagrams | | Physical book (Amazon) | $35–45 | ✅ Yes | No DRM, but not searchable | | GitHub summary repos | Free | ⚠️ Partial | Great for revision, not for first-time learning | | Random "Alex Wu PDF" link | Free (but risky) | ❌ No | Likely malware, outdated, or incomplete | system design interview alex wu pdf github verified
If you are preparing for a senior software engineering interview at a FAANG company (Facebook, Apple, Amazon, Netflix, Google) or any top-tier tech firm, you have undoubtedly encountered two names: Alex Xu (often misspelled as "Alex Wu") and the infamous search query— "System Design Interview Alex Wu PDF GitHub verified." GitHub is a code repository, but it has