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.

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

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What must be true for a type to be used with FilledList?

It must implement a specific interface
It must have a default constructor
It must override the equals method
It must be a final class

The correct answer is: It must have a default constructor

In order for a type to be used with FilledList, it must have a default constructor. This means that the class must have a no-argument constructor that is used to create objects of that class. Option A is incorrect because implementing a specific interface is not necessary for a type to be used with FilledList. Option C is incorrect because overriding the equals method is not a requirement for a type to be used with FilledList. Option D is incorrect because a class does not need to be declared as final in order to be used with FilledList. However, implementing a default constructor is necessary as it allows objects of that class to be initialized and used with FilledList.