~learn.
← progressconcept map

What you know, concept by concept

213 concepts from the course, coloured by your quick checks, trial answers and review cards. Tap a shaky one for a two-minute refresher.

known·/ 213solid or mastered
how is this worked out? ›
  • Quick checks in the stage where a concept is taught (first tries), weighted towards questions that mention it.
  • Trial questions that mention it, from your last attempt at each part.
  • Review cards that mention it, by Leitner box; an “Again” counts as missed.
  • Seen = you finished the stage it's taught in. Shaky = under 60% right. Mastered = 85%+ across three or more checks from two kinds of practice.
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W00Foundations

48 concepts

W01Data at Scale

35 concepts

W02Failure-First Design

17 concepts

W03Messaging and Async Processing

14 concepts

W04Caching

22 concepts

W05Consistency and Coordination

20 concepts

W06Designing a Notification Platform

2 concepts

W07Designing a Search System

9 concepts

W08Designing an Analytics Pipeline

12 concepts

W09Multi-tenancy and Security

12 concepts

W10Production Readiness and Operational Excellence

22 concepts