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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What would happen if you try to use an uninitialized object reference?

Compilation error
NullPointerException
It would be initialized to a new object of its class
Nothing, it's a valid operation

The correct answer is: NullPointerException

If you try to use an uninitialized object reference, you will receive a NullPointerException. This means that you tried to access an object that does not exist or has not been created yet. Option A is incorrect because a compilation error occurs when there is a mistake in the code itself, such as a syntax error. Option C is incorrect because an uninitialized object reference does not automatically get initialized to a new object. Option D is incorrect because it is not a valid operation to use an uninitialized object reference.