Mastering Java: The Ultimate 2025 All-In-One Quiz to Excel in 'Thinking in Java'

Question: 1 / 510

Which interfaces does NRobot implement?

Null

Robot

Both Null and Robot

NRobot implements both the Null and Robot interfaces as it is coded to allow for null robots (robots that don't have any specific functionality) and regular robots that have designated functions. Options A and D are incorrect because they specify only one interface, whereas NRobot implements both interfaces. Option B is incorrect because it specifies only the Robot interface, while NRobot also implements the Null interface. Therefore, the correct answer is C.

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Neither Null nor Robot

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