Everyone knows, that Spring is one of the most powerful and useful frameworks for Java. So how deep are you familiar with it? Level 1 – You know how to use Spring basic without understanding how it actually works under the hood. Level 2 – You understand Spring internals, so you can customize it in accordance with the needs of your project. We offer you an upgrade to Level 3 – to obtain knowledge of very particular but important details about Spring. This session includes many intricate riddles about Spring, which were gathered from real production java projects.