Quick-reference guides for coding and system design interviews. Everything you need on one screen.
The complete Big O notation reference. Time and space complexity for every data structure, sorting algorithm, and graph algorithm — with visual charts.
Coding InterviewsThe ultimate system design reference. Load balancing, caching, databases, message queues, API design, microservices patterns, consistency models, and key numbers.
System DesignCompare AWS Glue, EMR, Athena, Kinesis Firehose, and DMS. Architecture, pricing, hidden traps, and copy-paste CLI snippets for each tool.
Data Engineering