Related InterviewSolutions

• Modify the program 2 of Type C to include constructors for the three classes.
• What is inheritance? Discuss its various forms.
• Imagine a publishing company that markets both books and audio-cassette versions of its works. Create a class publication that stores the title (a string) ad price (type float) of a publication. From this class derive two classes: book, which adds a page count (type int); and tape, which adds a playing time in minutes (type float). Each of these three classes should have a getdata() function to get its data from the user at the keyboard, and a putdata() function to display its data.Write a main() program to test the book and tape classes by creating instances of them, asking the user to fill in their data with getdata(), and then displaying the data with putdata().
• Answer the questions (i) to (iv) based on the following: class FaceToFace{char CenterCode[10];public:void Input( );void Output( );};class Online{char website[50];public:void SiteIn( ); void SiteOut( );};class Training: public FaceToFace, private online{ long Tcode; loat charge;int period;public:void Register( );void show( );};(i) Which type of inheritance is shown in the above example?(ii) Write names of all the member functions accessible from Show( ) function of class Training.(iii) Write name of all the member accessible through an object of class Training.(iv) Is the function Output( ) accessible inside the function SiteOut( )? Justify your answer?
• Discuss various reasons that support the concept of inheritance in Object Oriented Languages.
• Differentiate between public and protected visibility in context of Object Oriented Programming giving suitable examples for each.
• When does ambiguity arise in multiple inheritance? How can one resolve it? What are virtual base classes? What is their significance?
• #include<iostream.h>class a{public: void something(){ cout<<"a"; }};class b{public;void something(){ cout<<"b"; }};class c:public a,public b { };int main(){c x;x.something();return 0;}(a) a::something() is called(b) b:: something() is called(c) Runtime Error(d) Syntax Error 
• What should be the structure of a class when it has to be a base class for other classes?
• What will be the output of the following program? #include<iostream.h>class Student{public:Student (char pname[]=" "){strcpy(name,pname);average=semesterHours=0;}void addCourse(int hours,float grade){average=(semesterHours*average+grade); semesterHours+=hours;average=semesterHours;}int hours(){ return semesterHours; }float gpa(){ return average;}protected:char name[40];int semesterHours;float average;};class GradStudent:public Student{public:GradStudent(char pname[]=" "):Student(pname){ qual_grade=0;}int qualifier(){ return qual_grade; }protected:int qual_grade;};int main() { Student commerce("Saurabh 7/."); GradStudent gs;commerce.addCourse(4,2.5);gs.addCourse(4,3.0);return 0;}