What is null data type?
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What is string data type?
What is the difference between abstract class and interface?
What is string pooling concept?
Does a class inherit the constructor of its super class?if it does, how can you hide that constructor? if it doesnot how can you call it from the sub class?
What is meant by method overriding?
Write a program to find the whether a number is an Armstrong number or not?
Which class has no duplicate elements?
What is the difference between jfc & wfc?
What is the difference between static synchronize() metod and synchronize() method?
Does list allow duplicates in java?
Why map is used in java?
What is the functionability stubs and skeletons?