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 happens to object storage when an object is no longer referenced and becomes garbage collected?

Memory is immediately freed.
Storage is marked and compacted at next garbage collection.
finalize() is called.
Data is overwritten for security.

The correct answer is: Storage is marked and compacted at next garbage collection.

When an object is no longer referenced and becomes garbage collected, the storage for the object is marked and will be compacted during the next garbage collection. This means that the storage space previously occupied by the object will be reused for future objects, resulting in more efficient use of memory. Option A is incorrect because memory is not immediately freed, as garbage collection occurs at a later time. Option C is incorrect because finalize() is called before garbage collection, but it does not necessarily result in immediate memory release. Option D is incorrect because data is only overwritten for security purposes when the storage is reused, not when an object becomes garbage collected.