Tata Consultancy Services
Part of Tata Group
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Tata Consultancy Services interview question
Explain the difference between an interface and an abstract class in Java and when you would use each one.
Interview Answer
Anonymous
5 Mar 2026
I explained that an interface defines a contract that a class must implement, while an abstract class can contain both abstract and concrete methods. I also mentioned that a class can implement multiple interfaces but can only extend one abstract class.