what is the use of virtual destructor in c++?

Correct Answer: All the features of C are similiar to C++ except some features, such as polymorphism, operator overloading which are supported in C++ but not in C language Both C and C++ language is similiar in their functionality but C++ provides with more tools and options

Correct Answer: It is necessary to understand some of the concepts used extensively in object oriented programmingThese include Objects Classes Data abstraction and encapsulation Inheritance Polymorphism Dynamic Binding Message passing

Correct Answer: C++ is created by Bjarne Stroustrup of AT&T Bell Labs as an extension of C, C++ is an object-oriented computer language used in the development of enterprise and commercial applications Microsoft?s Visual C++ became the premier language of choice among developers and programmers

Correct Answer: In C++, void represents the absence of type, so void pointers are pointers that point to a value that has no type The void pointers can point to any data type You can declare void pointer as follows: void *p;

Correct Answer: Stack Because of its LIFO (Last In First Out) property it remembers its ?caller? so knows whom to return when the function has to return Recursion makes use of system stack for storing the return addresses of the function calls Every recursive function has its equivalent iterative (non-recursive) function Even when such equivalent iterative procedures are written, explicit stack is to be used

Correct Answer: A reference variable provides an alias to a previously defined variable Data -type & reference-name = variable name

Correct Answer: ConstKeyword indicates that memory once initialized, should not be altered by a program Volatile keyword indicates that the value in the memory location can be altered even though nothing in the program Mutable keyword indicates that particular member of a structure or class can be altered even if a particular structure variable, class, or class member function is constant

Correct Answer: Copy constructor is a constructor function with the same name as the class and used to make deep copy of objects

Correct Answer: A default constructor is a constructor that either has no parameters, or if it has parameters, all the parameters have default values

Correct Answer: Dynamic binding (also known as late binding) means that the code associated with a given procedure call is not known until the time of the call at run timeIt is associated with polymorphism and inheritance