System Design Interview Alex Hu Pdf | Top
Introduction
- For regular users: Use Push. Pre-compute the feed when they post.
- For Celebrities (Users with >X followers): Use Pull. Do not attempt to push to millions of feeds. Instead, flag them as "celebrities." When a user reads their feed, the system merges pre-computed posts from friends + real-time fetches from celebrities they follow.
Here’s a useful, practical review of the resource commonly referred to as the System Design Interview by Alex Xu (often searched for as a PDF). system design interview alex hu pdf
Key Topics Covered
No live coding or API design – Focuses on block diagrams and high-level components. Many interviews now also ask to define key APIs, data models, or handle partial failures. Introduction
Use Volume 2 for senior roles – If you have <3 years experience, Vol 1 is enough. For staff/principal, Vol 2 is necessary (it covers advanced topics like distributed counters, S3-like storage). For regular users: Use Push