LANGUAGES | C++ | C++ INTERVIEW QUESTION AND ANSWERS | 03

C++ Interview

C++ Interview Question and Answers:

11. what is the difference between c &c++?
                c++ ia an object oriented programing but c is a procedure oriented programing.c is super set of c++. c can't suport inheritance,function overloading, method overloading etc. but c++ can do this.In c-programe the main function could not return a value but in the c++ the main function shuld return a value.

12. Define destuctors?
                A destructor is called for a class object when that object passes out of scope or is explicitly deleted.A destructors as the name implies is used to destroy the objects that have been created by a constructors.Like a constructor , the destructor is a member function whose name is the same as the class name but is precided by a tilde.

13. How variable declaration in c++ differs that in c?
                C requires all the variables to be declared at the beginning of a scope but in c++ we can declare variables anywhere in the scope. This makes the programmer easier to understand because the variables are declared in the context of their use.

14. What is copy constructor?
                Copy constructor is a constructor function with the same name as the class and used to make deep copy of objects.

15. What is a class?
                A class is a collection of objects.