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 difference does a PriorityQueue introduce in its behavior?

Allows random access to elements
Keeps elements sorted according to their natural order
Sorts elements in FIFO order
Positions elements based on their priority

The correct answer is: Positions elements based on their priority

A priority queue follows a particular order, i.e., the "priority" of the elements. The element with the highest priority is placed at the front of the queue, and so on. This is different from a regular queue, which follows the "first in, first out" (FIFO) rule. Option A is incorrect because priority queues do not allow for random access. Option B is incorrect because it does not necessarily keep elements sorted according to their natural order, only according to their priority. Option C is incorrect because, as mentioned, priority queues do not follow the FIFO rule. Therefore, option D is the correct answer as it accurately describes the unique behavior introduced by a priority queue.