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The order of constructors is determined by the sequence they are called in the code, starting with the base class constructor and moving to the derived class constructor. Destructors are called in the reverse order of constructors, starting with the derived class destructor and moving to the base class destructor.

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What are constructors and destructors and how they work?

Constructors & destructors are special member fns of a class. Constructor is a fn with the same name of the class and is used to initialize the object. ie automatic initialization is done by constructor. When an object is invoked then constuctor should be called. Similarly destructor is also a speial function is used to destroy the objects. Its name is also same as class name, but a tild(~) symbol should be used along with destruction function name. eg:~classname()


What do you mean by finalizer method?

In C++ you have object constructors and object destructors. Both are called by the developer. In Java and C# you have constructors and finalizer methods, so Java and C# both have support for finalizer methods (also known simply as finalizer). So the finalizer methods are similar to the destructors of C++ with a very important twist, the finalizer method is called by the garbage collector when an object is freed and not by the programmer (like the destructors in C++). Both finalizers in Java, C# and destructors in C++ can be used to free resources such as sockets or file handles that the method is using. However, because the finalizer methods are called by the garbage collector the programmer has no control of when the finalizer method will be called. As such it is NOT A GOOD IDEA to use finalizer methods. One can write the methods of an object in such a way as to clean up after themselves.


What are the various concepts of c plus plus?

1.Classes and Objects 2.Constructors and Destructors 3.Inheritance 4.Polymorphism 5.Dynamic Binding


What is the use of constructors?

Constructors are used in object-oriented programming languages to create usable instances of abstract data types (classes).


What is the Difference between virtual methods and non virtual methods in c sharp?

A function is a method that returns a value other than void. Methods includes functions, subroutines, constructors, destructors, and properties.


When constructor function are called in java?

Constructors are called during object creation.


What are parameterized constructors with example in RDBMS?

Parameterized constructors (or more simply "constructors") allow you to create a new instance of a class while simultaneously passing arguments to the new instance. Constructors are essential for object oriented programming since they allow user-defined construction code to be passed parameters by the creator of the instance. They simplify client code by allowing a new object instance to be created and initialized in a single expression.


When is a destructor called?

Destructors are called when an object is no longer used. In a language like C++, this is done explicitly by the programmer when the delete operator is used on the object.


What is a constructor with value zero?

Constructors have no value, zero or otherwise. That is, constructors cannot return a value. This is because constructors are not functions in the sense you cannot call a constructor directly. Constructors are invoked in the background when you instantiate an object of the class, thus any return value would be lost in the background, and would therefore not be visible to the invokee.


What is a special member function that constructs storage area for the data member of an object?

You are referring to class constructors however constructors are not functions of any kind; they have no return type (not even void), thus we cannot take the address of a constructor. Moreover, constructors do not actually construct the storage area; an object's memory is allocated automatically at the point the object is instantiated. Constructors are best thought of as being object initialisers, which is really the final part of the construction process. Unlike ordinary functions, constructors also include an initialisation section which is executed implicitly even when no initialisation section is specified. The initialiser section is a list of constructors (technically, initialisers). If a non-static member or base class has no initialiser specified, that member or base is default constructed. The order of construction is always base before member (in the order specified by the class declaration). Once the initialisation section is complete, the constructor body executes. In most cases, constructor bodies are empty {} however we can use them to perform additional initialisation that cannot be easily performed by the initialisation section.


What is copy constructor in object oriented programming?

The purpose of constructor in object oriented programming is to initialize data. Likewise copy constructors are used to initialize an object with data from another object.


What function initializes variables in a class?

you have to initialize it into the "Constructor" which is a function without dataType and it's name is the same with the class nameEX:-class Exforsys{private:int a,b;public:Exforsys();...};Exforsys :: Exforsys(){a=0;b=0;}the EX from : http://www.exforsys.com/tutorials/c-plus-plus/class-constructors-and-destructors-in-c.htmlI recommend this link for You Under the title "Constructors and destructors" :http://www.cplusplus.com/doc/tutorial/classes/You can also See : http://www.win.tue.nl/~maubach/university/education/online-references/cpp/swartz/notescpp/oop-condestructors/constructors.html