Does java have extension methods?
Explain different ways of passing arguments to sub-routine?
Adapter classes?
What is run-time class and system class? what is their purpose?
Is singleton thread safe in java?
Can a class extend 2 classes in java?
How will you add panel to a frame?
What are the restrictions that are applied to the java static methods?
What is use of map in java?
What will happen if static modifier is removed from the signature of the main method?
Is string serializable in java?
Explain the differences between abstraction and encapsulation?
What is a java lambda expression?