Mastering Java: The Ultimate Quiz for 'Thinking in Java'

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Mastering Java: The Ultimate Quiz for 'Thinking in Java'. Dive deep into Java with multiple-choice questions. Challenge yourself with quiz questions designed to test and improve your understanding of the 'Thinking in Java' book. Get ready for your exam!

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When using interfaces, what can calling code know about a class?

Implementation details
Private member variables
What methods might be called
The inheritance hierarchy

The correct answer is: What methods might be called

When using interfaces, calling code can know what methods might be called from a class because interfaces define a set of methods that should be implemented by the class. However, calling code cannot know about the implementation details of the class (option A) or access its private member variables (option B). The inheritance hierarchy (option D) can be known, but this is not specific to the use of interfaces.