Object-oriented programming · interview question
How would you explain the key difference between an abstract class and an interface in a Java interview?
Multiple choiceEasychapter-5-curatedpremiumoopcomposition-vs-inheritance
Answer and explanation
Correct answer
C. Abstract classes can have method implementations; interfaces cannot.
Why
Abstract classes can have method implementations, allowing them to provide a common base behavior, while interfaces cannot (though they can have default methods).
Test yourself on Object-oriented programming
A free test with instant, explained results. No account needed.
More Object-oriented programming questions
- What happens if a subclass does not implement all abstract methods from its abstract superclass?
- What does the 'this' keyword refer to within an instance method of a class?
- Which Java keyword would you use to declare an abstract class in Java?
- Which statement correctly creates an instance of the 'Product' class?
- How does using interfaces in Java promote flexibility in application design?
- In Java, why might composition be preferred over inheritance when designing a class to calculate discounts for…