Does treeset allow null in java?
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What is the requirement of thread in java?
What is thread count in java?
What is exception hierarchy in java?
What is the multilevel inheritance. and also give the Example of it ?
What is the final keyword in java?
What is scanner in java?
What is map and hashmap? also tell the difference.
Can a class have multiple subclasses?
Can we start a thread twice in java?
What is a “stateless” protocol ?
How can you avoid serialization in child class if the base class is implementing the serializable interface?
Which keyword specify that a variable is effectively final ?