Ace Java 2025: Rock Your 'Thinking in Java' Challenge!

Question: 1 / 510

What is the primary functionality of a Null object based on the description?

To serve as a functional placeholder for debugging purposes

To throw exceptions when methods are called on it

To act as an intelligent placeholder for null

The primary functionality of a Null object is to act as an intelligent placeholder for null. This means that when a method is called on the Null object, it will not throw an exception like option B suggests, but will instead handle the request in an intelligent and appropriate manner. Option A is incorrect because Null objects are not primarily used for debugging purposes. Option D is also incorrect as it suggests its purpose is to log method calls, which is not necessarily a primary functionality of a Null object. Therefore, option C is the best answer as it accurately describes the main purpose of a Null object.

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To log method calls for later review

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