What is the difference between early binding and late binding?

What is the difference between an interface and an abstract class?

What parameters are required to be passed to a class constructor?Here they haven't mentioned any specific language so let's consider all languages.

What are the four principles of object-oriented programming?

Each object of a class has its own copy of the class's ________.

Which class is thread-safe i.e. multiple threads cannot access it simultaneously,So it is safe and will result in an order?

Which method causes the current thread to wait for the specified milliseconds, until another thread notifies? (invokes notify() or notifyAll() method)?

The object cloning is a way to create exact copy of an object?

The clone() method is defined in?

The Object class is not a parent class of all the classes in java by default?