Some Important C++ and Object Oriented Programming Questions for Interview

• What is a class?
• What is an object?
• What is the difference between an object and a class?
• What is the difference between class and structure?
• What is public, protected, private?
• What are virtual functions?
• What is friend function?
• What is a scope resolution operator?
• What do you mean by inheritance?
• What is abstraction?
• What is polymorphism? Explain with an example.
• What is encapsulation?
• What do you mean by binding of data and functions?
• What is function overloading and operator overloading?
• What is virtual class and friend class?
• What do you mean by inline function?
• What do you mean by public, private, protected and friendly? When is an object created and what is its lifetime?
• What do you mean by multiple inheritance and multilevel inheritance? Differentiate between them.
• Difference between realloc() and free?
• What is a template?
• What are the main differences between procedure oriented languages and object oriented languages?
• What is R T T I ?
• What are generic functions and generic classes?
• What is namespace?
• What is the difference between pass by reference and pass by value?
• Why do we use virtual functions?
• What do you mean by pure virtual functions?
• What are virtual classes?
• Does c++ support multilevel and multiple inheritance?
• What are the advantages of inheritance?
• When is a memory allocated to a class?
• What is the difference between declaration and definition? What is virtual constructors/destructors? In c++ there is only virtual destructors, no constructors. Why?
• What is late bound function call and early bound function call? Differentiate.
• How is exception handling carried out in c++? When will a constructor executed?
• What is Dynamic Polymorphism?
• Write a macro for swapping integers