https://jenkov.com/tutorials/java-concurrency/thread-safety.html https://levelup.gitconnected.com/top-java-concurrency-interview-questions-every-senior-backend-engineer-should-know-part1-b72142c1fdf8 https://dev.to/krishna7852/50-interview-questions-on-multithreading-with-answers-2f8n
https://www.udemy.com/course/java-multithreading/ https://www.udemy.com/course/java-multi-threading-programming/