Mastering Java: The Ultimate Quiz for 'Thinking in Java'

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Mastering Java: The Ultimate Quiz for 'Thinking in Java'. Dive deep into Java with multiple-choice questions. Challenge yourself with quiz questions designed to test and improve your understanding of the 'Thinking in Java' book. Get ready for your exam!

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What is the purpose of the join() method in threading?

To pause the execution of the current thread
To forcefully stop a thread
To ensure a thread must complete before execution continues elsewhere
To combine two threads into one

The correct answer is: To ensure a thread must complete before execution continues elsewhere

The join() method is not used to pause the execution of a thread (option A) as other methods like sleep() or wait() are used for that purpose. It is also not used to forcefully stop a thread (option B), as this can cause unexpected errors in the program and is not recommended. The method does not combine two threads into one (option D), but rather it waits for a thread to finish executing before moving on to the next code. Therefore, the purpose of the join() method is to ensure a thread completes before execution continues elsewhere, allowing for more organized and coordinated execution of multiple threads.