TECHNICAL INTERVIEW QUESTIONS AND ANSWER 6 TO 10

6.INHERITANCE:

         Inheritance is a mechanism in which new class is derived from the existing class. Existing class is called as a super class or parent class or base class. New class which is derived is called as a sub class or child class or derived class. This inheritance will also inherits the properties of base class.

7.TYPES OF INHERITANCE:

Single Inheritance

Multiple Inheritance

Multi-Level Inheritance

Hierarchical Inheritance

Hybrid Inheritance (also known as Virtual Inheritance)

8.DEMONSTRATION OF INHERITANCE:

IN CPP:

#include<stdio.h>

#include<conio.h>

class Vehicle

{

public:

Vehicle()

{  cout<<”\n This is a vehicle” };

};

Class Car : public Vehicle {};

int main()

{

Car obj;

return 0;

}

Output : This is a vehicle

9.LOOPS:

         Loop executes a set of statements for a predetermined number of times. There are 2 types of loops namely Entry Controlled Loop and Exit Controlled Loop.

10.CLASS VS INTERFACE:

No	CLASS	INTERFACE
1.	Supports only multilevel and hierarchical inheritance but not multiple inheritance,	Supports all types of inheritance including multiple inheritance.
2.	“extends” keyword is used to inherit.	“implements” keyword is used to inherit.
3.	Methods can be final and static.	Methods should not be final and static.
4.	Variables can be private.	Variables should be public only.
5.	Can have constructors.	Cannot have constructors.