Mastering Java: The Ultimate Quiz for 'Thinking in Java' 2026 - Free Java Programming Practice Questions and Study Guide

Question: 1 / 510

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

Implementation details

Private member variables

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.

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The inheritance hierarchy

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