5 importent point for oops

8/6/2019 5 Importent Point for OOPs

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5 important OOP Interview questions

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• 4 Important Principles

• Abstraction, Encapsulation, Inheritance and Polymorphism.

• Interview questions covering Abstraction, Encapsulation, Inheritance and Polymorphism.• Concepts of Abstract classes and Interfaces

• Interview questions around abstract classes and interfaces

• Concept of Polymorphism and different types of polymorphism

• Interview questions around static and dynamic polymorphism.

• Concept of Shadowing

• Interview questions around shadowing and overriding.

• Concept of access modifiers

• Interview questions around Access modifiers and encapsulation.

• Concept of Static keyword• Interview questions around Static keyword.

• 3 tier-architecture concepts using OOPS

• Interview questions 3-tier architecture.

• Study material with Course

• Source code of what is taken in the class

• Interview questions Ebook covering 400 Interview question PDF with answers

• 1 month of subscription of 400 videos covering WCF,WPF,WWF,Azure,Silverlight , Design pattern , UML and lot more. Click on the below

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What are the 4 important principles in OOP ?www.QuestPond.com





What’s a abstract class ?

Abstract classes are one of the essential behaviors provided by .NET. Commonly,

you would like to make classes that only represent base classes, and don’t want

anyone to create objects of these class types. You can make use of abstract classesto implement such functionality in C# using the modifier 'abstract'.

An abstract class means that, no object of this class can be instantiated, but can

make derivations of this.

An abstract class can contain either abstract methods or non abstract methods.

Abstract members do not have any implementation in the abstract class, but the

same has to be provided in its derived class.

An abstract class cannot be a sealed class. I.e. the following declaration is incorrect.

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What’s a interface ?



What’s a difference between interfaces and abstract classes ?



Two types of polymorphism www.QuestPond.com





Both the method namesare same but they act

differently as per inputs

This will invoke thecalculation of total cost

with out discount.

This will invoke the

calculation of total costwith discount.

Static polymorphism is achieved by using method overloadi



Parent Product class

Inherited Child Product class

Virtual keyword necessary to override the method

Override keyword necessary to define new implementation

Class inherited and ‘getTotalCost’ overridden

with new functionality



clsProduct objProduct;

objProduct = new clsProduct();

objProduct.getTotalCost(intQty, intPerProductCost,"INR")

objProduct = new clsProductWithDiscount();

objProduct.getTotalCost(intQty, intPerProductCost,"INR")

This invokes the parent class code

This invokes the child class code

Dynamic polymorphism is achieved by using overriding

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What is overloading and overriding ?

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clsProduct obj = new clsProduct();

obj.CheckProduct(intPerProductCost);

obj.CheckQty(intQty);

int totalCost = obj.getTotalCost(10,100);

clsProduct obj = new clsProduct();

obj.PerProductCost = intPerProductCost;

obj.Quantity = intQty;

Encapsulation means hiding complexity Extraexposed

functio

nalities.

Comp

lic ationencapsu

late

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•Send a message to Wiziq Support chat user or you can call for more details @ 91-9216405405

• 4 Important Principles

• Abstraction, Encapsulation, Inheritance and Polymorphism.

• Interview questions covering Abstraction, Encapsulation, Inheritance and Polymorphism.

• Concepts of Abstract classes and Interfaces

• Interview questions around abstract classes and interfaces

• Concept of Polymorphism and different types of polymorphism

• Interview questions around static and dynamic polymorphism.

• Concept of Shadowing

• Interview questions around shadowing and overriding.

• Concept of access modifiers

• Interview questions around Access modifiers and encapsulation.

• Concept of Static keyword• Interview questions around Static keyword.

• 3 tier-architecture concepts using OOPS

• Interview questions 3-tier architecture.

• Study material with Course

• Source code of what is taken in the class

• Interview questions Ebook covering 400 Interview question PDF with answers

• 1 month of subscription of 400 videos covering WCF,WPF,WWF,Azure,Silverlight , Design pattern , UML and lot more. Click on the below

image to know about the same.

www.QuestPond.com







Visit to view 300 videos @

http://www.questpond.com



5 importent point for oops

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