Here is the list of some useful Java interview questions for experienced Java programmers having experience in range of 2 to 5 years. As an experienced developer you are expected to learn about OOP concepts, Java basics, Java Collection framework, Multi-threading and Concurrency utilities introduced in Java 5 and 6, Debugging Java application, Algorithm and Data structure, Some questions on design patterns, JVM and Garbage collection and couple of puzzles. Actually its mix of everything you do in your day to day work.
