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

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Want to excel in Java? Test your knowledge with our ultimate quiz based on 'Thinking in Java'. Engage with multiple-choice questions and in-depth explanations. Boost your understanding and prepare for your exam with confidence.

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In the provided code, how is a new Robot object created that behaves as a null object?

Using standard Java reflection
By directly calling constructors
By using a Proxy combined with an InvocationHandler
Through method overloading in the Robot interface

The correct answer is: By using a Proxy combined with an InvocationHandler

Using standard Java reflection (A) and directly calling constructors (B) are both methods commonly used to create new objects in Java, but neither of these methods would result in a null object. A Proxy combined with an InvocationHandler is a design pattern that allows for the creation of a null object, where all method calls on the object will have no effect or return null. Method overloading in the Robot interface (D) would not result in the creation of a new object at all.