What is treeset in java?
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Why we do exception handling in java and how many types of exceptions are there?
How do you allocate memory to object?
What is the base class of all classes?
What is flag in java?
Is nan false?
Difference between JDK, JRE, JVM
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How to define a constant variable in Java?
What data type is a string?
Can we declare a class as abstract without having any abstract method?
Java does not support multiple inheritance. how interface helps in the same?
Explain the difference between an object-oriented programming language and object-based programming language?
Why is a singleton bad?