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Today's mock interview: "Design Twitter or "X"".

Our guest candidate is Eugene from Crushing Tech Education. He takes on this extremely popular system design interview question.

You can see more designs from Eugene on his very useful channel:    / @crushingtecheducation  

Chapters:
00:00 Intro
01:17 Question: How would you design Twitter or X.com?
01:40 1. Clarification questions
05:46 2.1 Design high-level (calculate metrics)
11:25 2.2 Design high level (API)
14:33 2.3 Design high level (components)
15:52 2.4 Design high level (database)
19:09 3.1 Drill down (workflow)
27:49 3.2 Drill down (timeline service)
29:18 3.3 Drill down (user follow)
30:59 3.4 Drill down (revisit workflow)
32:57 3.5 Drill down (user timeline)
39:08 3.6 Drill down (summary)
41:42 4.1 Refine the design (bottlenecks)
47:10 4.2 Refinie the design (popular users)
48:55 4.3 Refine the design (tweet storage)
52:55 Final feedback and end interview

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