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

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Prepare for your Java exam with our ultimate quiz based on 'Thinking in Java'. Engage with expertly crafted questions that enhance your learning process. Perfect for Java enthusiasts looking to solidify their knowledge!

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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Which statement is true about TreeSet?

TreeSet does not allow duplicate elements
TreeSet allows rapid removals and insertions
TreeSet maintains elements in a random order
TreeSet is not based on the Set interface

The correct answer is: TreeSet does not allow duplicate elements

TreeSet is a collection in Java that does not allow duplicate elements to be stored. This is because it implements the Set interface, which does not allow duplicate elements. Option B is incorrect because while TreeSet does allow for rapid removals and insertions, this is not a defining characteristic of the collection. Option C is incorrect as TreeSet maintains elements in a sorted order, not a random order. Option D is incorrect because TreeSet is indeed based on the Set interface in Java.