What are the properties of thread?
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What is the purpose of garbage collection in java? When is it used?
How HashMap implemented in java? how it internally works when values are added or searched from hashMap?What is the difference betweenthe implementation of hashmap and Linked Hashmap?
What is the difference between error and an exception?
What is busy spin, and why should you use it?
What a static class can contains?
Why should I use abstract class?
How GUI component handle its own events?
what should do when using multiple catch() block & what should never do for the same?
What are instance variables?
What is the difference between replace and replace all?
What is the purpose of finalization?
What checkbox method allows you to tell if a checkbox is checked?