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Gone are the days, when knowing the difference between String and String Buffer can help you to go through the second round of interview, questions are becoming more advanced and interviewers are asking more deep questions.When I started my career, questions like Vector vs Array and Hash Map vs Hashtable were the most popular ones and just memorizing them gives you a good chance to do well in interviews, but not anymore.If you need more questions then you can also check out this Java Interview Guide: 200 Interview Questions with Answers Given the list is long and we have questions from everywhere, it's imperative that answers must be short, concise and crisp, no fluffing at all.So apart from this paragraph, you will only hear from me is the questions and answers, no more context, no more feedback and no more evaluation.What I mean, if one thread changes the reference variable to points to another array, that will provide a volatile guarantee, but if multiple threads are changing individual array elements they won't be having happens before guarantee provided by the volatile modifier.2) Can volatile make a non-atomic operation to atomic?While a candidate, can expand and test their knowledge about key areas of Java programming language and platform.In 2018 and in coming years the focus will be more on advanced concurrency concept, JVM internals, 32-bit vs 64-bit JVM, unit testing, and clean code.

It has questions for both entry-level Java programmers and senior developers with years of experience.

For that, I have already written blog posts, where you can find my views on a particular question, e.g.

why I like that question, what makes them challenging and what kind of answer you should expect from candidates.

Nowadays, you will get questions from the areas where not many Java programmer looks e.g.

NIO, patterns, sophisticated unit testing or those which are hard to master e.g.

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