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

OOAD Interview Questions

Questions Answers Views Company eMail

What are the types of polymorphism?

922

What is inheritance in java?

2 1161

What is abstract method?

931

If there is a conflict between base class method definition and interface default method definition, which definition is picked?

1 1771

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

994

What if we make the method as abstract in another interface?

923

What is the @functionalinterface annotation?

899

Can we have a default method definition in the interface without specifying the keyword "default"?

924

What is a nested interface?

985

If a method definition has been specified in the base class and the interface which the class is implementing, which definition will be picked if we try to access it using interface reference and class object?

903

Can we use static method definitions in interfaces?

975

Can a class implement two interfaces having default method with same name and signature?

962

What if we override the conflicting method in the class?

893

Can we override static methods? Why?

890

Can we access interface static method using interface references?

1008

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Un-Answered Questions { OOAD }

Explain method overriding.

999

What is the default access modifier for a class,struct and an interface declared directly with a namespace?

914

Differentiate between an abstract class and an interface?

936

What is a final variable?

965

What's the benefit of using inheritance?

1068

What is the difference between a virtual method and an abstract method?

891

What is data encapsulation and what is its significance?

850

What is sealed modifiers?

963

Explain basic concepts of OOPS?

860

What is a constructor in class?

1029

How can we call the base method without creating an instance?

950

What do you mean by operator overloading?

1040

Does PowerShell support OOPs?

971

Name some languages which have object oriented language and characteristics?

938

Difference between composition and inheritance ?

914

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