https://www.youtube.com/playlist?list=PLfIQCoEU1T4sE9cSqUieDk1GW0fOxc_XN
https://github.com/bregman-arie/devops-exercises
80+ Kubernetes Interview Questions & Answers
https://airtable.com/shrtD8ZXBJ2irS7ge/tblmaYf5eiMtk5pp1/viwe8rfrLpNn9Lyt0?blocks=hide
Algorithms for coding interviews
https://systemdesign.one/system-design-interview-cheatsheet/#chat-service