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Top 21 Frequently Asked Java Interview Questions Answers

If you have been to couple of Java interviews then you know that there are some questions which keep repeating e.g. difference between == and equals() method and may of it's popular cousins like HashMap vs Hashtable, ArrayList vs LinkedList, difference between equals() and hashCode(), or difference between Comparator and Comparable in Java. I call them frequently asked Java interview questions, and I suggest every Java developer to make a list of them for their own reference and revision. I am sure many Java programmer already has such list of questions handy, if not this is a good time to find and make your own list. These are the questions which you simply can't afford to miss, especially at freshers level. They appear at various stage of Java interviews. Most likely you will see them on telephonic round, where Interviewer just want to filter candidates between who knows Java and who doesn't.