Can main() method in java can return any data?
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What happens if we don’t override run method ?
What is meant by event handling?
Explain the polymorphism principle?
Can interface be private in java?
How to create an interface?
If all the methods in abstract class are declared as abstract then what is difference between abstract class and in interface?
Is there is any error if you have multiple main methods in the same class?
Define max and min heap, also the search time of heap.
Explain, java is compatible with all servers but not all browsers?
How do I print a “?
Can arraylist contain null values?
How do you check if a string is lexicographically in java?