OOAD Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

OOAD Interview Questions

Questions Answers Views Company eMail

Why are virtual users created?

Wipro,

1064

what is virtual function and pure virtual function ?

Infosys,

985

What are virtual functions, base class pointer, derived class pointer, biding references?

HPCL, Hughes Systique Corporation,

990

What is Abstract method and how different from Virtual Method?

941

What do you mean by virtual function and virtual classes?

MCN Solutions,

1026

What is polymorphism? When is it employed? give an example.

iNautix,

1033

What is the best tool for modeling and ORM framework

Infosys,

1046

What is Overloading ? Is it similar to overriding ?

MCN Solutions,

1010

Explain the use of Vtable and what are the various problems to override the functions?

Ittiam Systems,

949

Does PowerShell support OOPs?

Microsoft,

1035

What is data abstraction? what are the three levels of data abstraction with Example?

TCS,

980

Is it possible to override private virtual methods?

Infosys,

997

Give any criteria when you use an abstract class and an interface?

Sans Pareil IT Services,

945

Define Data Abstraction. What is its importance?

Amazon, Infosys,

986

How to make a class accessible as a web service?

BirlaSoft,

965

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Un-Answered Questions { OOAD }

What interface must an object implement before it can be written to a stream as an object?

1087

What is static and dynamic Binding?

1081

Can we have default method with same name and signature in the derived interface as the static method in base interface and vice versa?

1050

Can you create an instance of an abstract class?

982

Differentiate between data abstraction and encapsulation.

984

How many instances can be created for an abstract class?

960

Explain about the design phase?

1040

What is the benefit of using inheritance?

1039

Why do we use oops concepts? What is its advantage?

1093

Which keyword can be used for overloading?

1001

What is an abstraction and why is it important?

1032

What is an interface?

1034

What is the difference between multiple and multilevel inheritance?

1022

Describe the Diamond problem. Where does this problem occur?

940

What is the difference between class and interface?

1160

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