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 is garbage collection in Java?

A process to clean up unused Java objects.
A method to delete instances of Java classes.
A mechanism to keep track of object references.
A manual process to free memory.

The correct answer is: A process to clean up unused Java objects.

Garbage collection in Java refers to the automatic process of removing unused objects from memory. This means that when an object is no longer being referenced by any part of the program, it will be deleted from memory by the garbage collector. Option B is incorrect because garbage collection does not involve deleting entire instances of classes, but rather cleaning up unused objects within those instances. Option C is partially correct, as garbage collection does involve keeping track of object references, but that is not the main purpose of the process. Option D is incorrect because garbage collection is an automatic process and does not require manual intervention.