What is hashset in java?
What are byte codes?
Why do we need hashset in java?
What is equals method in java?
How can we pass argument to a function by reference instead of pass by value?
What is a vararg?
Explain the concept of polymorphism with examples?
How do you declare an empty string?
Can a class have 2 constructors?
What happens if we override private method?
How do you implement tree mirroring in java?
Why can we not override static method?
What do you mean by collectors in java 8?