Explain what is object oriented programming language?
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What does it mean that a method or class is abstract?
What is the difference between a class and an object?
Can we have default method with same name and signature in the derived interface as the static method in base interface and vice versa?
Can we override a method by using same method name and arguments but different return types?
explain dynamic binding
A class inherits from 2 interfaces and both the interfaces have the same method name as shown below. How should the class implement the drive method for both car and bus interface?
What are the four important foundation concepts of OOP ?
How can we call the base method without creating an instance?
Difference between composition and inheritance ?
What is the purpose of late binding in object-oriented programming?
What's the main difference between arraylist / hashmap and vector / hashtable?
What is a final variable?
Design Patterns 
