Core Java · interview question
Consider a class hierarchy where a class 'Product' extends 'Item' and implements 'Sellable'. If 'Item' has a method 'display()' and 'Sellable' has a default method 'display()', which method is called on a 'Product' instance?
Multiple choiceHardchapter-5-curatedpremiumcore-javadefault-methods-and-multiple-inheritance
Answer and explanation
Correct answer
D. The method in 'Item'
Why
In Java, class methods take precedence over interface default methods. Therefore, if the class 'Product' inherits 'display()' from 'Item', it will use that method instead of the default method in 'Sellable'.
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