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

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Dive into the depths of Java with our quiz based on "Thinking in Java, Fourth Edition" by Bruce Eckel. Test your knowledge, solidify concepts, and prepare for certification with challenging questions and insightful feedback.

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

  1. Call newNullRobot with SnowRemovalRobot.class as an argument

  2. Instantiate SnowRemovalRobot with a null constructor

  3. Directly call the NullRobotProxyHandler constructor passing SnowRemovalRobot.class

  4. Use a static factory method in SnowRemovalRobot

The correct answer is: 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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