Mastering Java: The Ultimate Quiz for 'Thinking in Java' 2025 - Free Java Programming Practice Questions and Study Guide

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How does one create a 'null' Robot object for a SnowRemovalRobot?

Call newNullRobot with SnowRemovalRobot.class as an argument

One can create a 'null' Robot object for a SnowRemovalRobot by calling the newNullRobot method and passing SnowRemovalRobot.class as an argument. This allows the creation of a null object specifically for the SnowRemovalRobot class. Option B is incorrect because a null constructor does not exist. Option C is incorrect because the NullRobotProxyHandler constructor is not designed to create a null object for a specific class. Option D is incorrect because using a static factory method in the SnowRemovalRobot class does not create a null object, but rather creates a new instance of the class.

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Instantiate SnowRemovalRobot with a null constructor

Directly call the NullRobotProxyHandler constructor passing SnowRemovalRobot.class

Use a static factory method in SnowRemovalRobot

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