How do you define a singleton class?
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which one is performance wise advantageious from List,Set,Map?
What is native code?
What is null data type?
Justify your answer that you can't define a method inside another method in java, if you can then how?
what is difference between global methods and local methods?
Tell me are there implementations for sorting and searching in the java libarary?
What are the rules for variable declaration?
What is isa relationship?
What is difference between hashset and hashmap?
What does a void function return?
What is the driver class?
What are the different data types in java?