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

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Mastering Java: The Ultimate Quiz for 'Thinking in Java'. Dive deep into Java with multiple-choice questions. Challenge yourself with quiz questions designed to test and improve your understanding of the 'Thinking in Java' book. Get ready for your exam!

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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.