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what modifiers are allowed for methods in an interface java interview question and answer

572 views · Published 27 November 2012 · 2:08 · Indexed 23 October 2026

Channel: Interview DOT · 2012 · Science & Technology

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What is the reason ,an Interface be able to extend more than one Interface but a Class can't extend more than one Class ? Java Interview Question and Answer :


What is the reason ,an Interface be able to extend more than one Interface but a Class can't extend more than one Class ?

Basically Java doesn't allow multiple inheritance, so a Class is restricted to extend only one Class. But an Interface is a pure abstraction model and doesn't have inheritance hierarchy like classes. 
So an Interface is allowed to extend more than one Interface.


 Can I mark the Interface as "final "?

No ,an interface cannot be marked as "final" ,Doing so will result in compilation error.

"illegal modifier for the interface finalInterface; only public & abstract are permitted."

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