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!

Practice this question and more.

What is the output of calling the 'toString()' method on an Object, which is not overridden?

The class name and the object's hash code
The memory address of the object
The values of the object's fields
A blank string

The correct answer is: The class name and the object's hash code

Calling the 'toString()' method on an Object that is not overridden will result in the class name and the object's hash code being outputted. This is because the 'toString()' method outputs a textual representation of an object, and if not overridden, it will default to the implementation provided by the Object class. This implementation includes the class name and the hash code, making option A the correct answer. Options B and C are incorrect because they do not pertain to the 'toString()' method or the default implementation for an Object. Option D is incorrect because the 'toString()' method does not return a blank string unless overridden to do so.