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what is the difference between abstract class and interfaces java job interview question

3,738 views · Published 9 November 2012 · 2:17 · Indexed 31 October 2026

Channel: Interview DOT · 2012 · Science & Technology

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Java Interview Questions and Answers : Job portal -- Java Tutorial / Interview

What's the difference between "Abstract class" and "Interfaces" ? Job Java Interview Question :

1.Abstract class only be inherited while interfaces cannot be extended but implemented.

2.Interface cannot implement any methods ,whereas an abstract class can have implementation.

3.Interface is not part of the class hierarchy while Abstract class comes in through inheritance.

4.Abstract class is a class that cannot be instantiated but contain implementation whereas Interface contains only method definition and no implementation.

5.An interface can extend only another interface whereas any class can extend an abstract class.

6.All variables declared in interface are final.

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