C++ Interview Questions

What is class in C++? What object in C++?
What is Abstraction and encapsulation in C++? 
What is virtual function? What is use of it?
What is pure virtual function? What is use of it?
What are the types of inheritance in C++? Explain it?
What is abstract class? How to use it?
What is abstract base class?

What is difference Between Interface and Abstract Class?
What are the different types of polymorphism in C++?
What is late binding and early binding? 
What is operator overloading? Explain with example?
What is function overloading? Explain with example?
What is Friend class? What is Friend function? Refer Link

What is template? How to use it?
Write code for base class inheritance using template

What is Object_slicing in C++

What is the slicing problem in C++?

What is difference between reference and pointer?
What is size of Empty Class and Empty Structure?
How to call function of derived class using base class reference/pointer?
How base class object callas to derived class function in case of virtual function.
What is virtual pointer
What is the purpose of constructor