Computer Science

In most of the cases, these virtual functions are defined with a null-body; it has no definition. Such functions in the base-class, are similar to do-nothing or dummy functions, they are called Pure Virtual Functions. Pure virtual functions is declared as a virtual function with its declaration followed by = 0. Syntax class Myclass {

The from of inheritance which derives a new class by multiple inheritance of base class, which are derived earlier from the same base class, is known as multipath inheritance. It involves more than one from of inheritance namely multilevel, multiple and hierarchal. All the public and protected members of ‘grand parent’ are inherited into ‘child’

The memory allocation operator new and delete can be overloaded to handle memory resource in a customized way. An application designed to handle memory allocation by itself through overloading can easily detect memory leaks. //Overloading of new and delete operators #include<iostream.h> Const int ARRAY-SIZE = 10; class vector { int*array; //array is dynamically allocatable data

The operator overloading feature of C++ is one of the methods of realizing polymorphism. C++ has the ability to provide the operators with a special meaning to an operator is known as operator overloading. We can overload all the C++ operators except the following: Size resolution operator (::) Scope of operator (size of) Conditional operator

Object’s data members can be dynamically initialized during runtime, even after their creation. One advantage is that it supports different initialization formats using overloaded constructors. This provides flexibility of using different forms of data at runtime depending upon the user’s need. //Object with different name pattern #include<iostream.h> #include<string.h> class name { char first[15]; //first name

Figure shows a simplified overview of the database design process. The first step shown is requirements collection and analysis. During this step, the database designers interview prospective database users to understand and document their data requirements. The result of this step is a concisely written set of users’ requirements. These requirements should be specified in

In this section, we give an overview of the schema evolution commands available in SQL, which can be used to alter a schema by adding or dropping tables, attributes, constraints, and other schema elements. This can be done while the database is operational and does not require recompilation of the database schema. Certain checks must