OOP:
1.Rate yourself in opp
2.what are private variables?, how to access private variable outside of class
3.diamond problem, real world example, how to solve it
4.oop piller with real world example
5.how we do abstraction
6.what is a constructor and what is called when object is use and no 7.need of it how to destroy it, (deconsturctor)
8.Abstract classes and interfaces.
9.Design patterns (e.g., Singleton, Factory).
10.What is Brute Force Approach?