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.

For what purpose is the 'allocateDirect()' method used?

To create a buffer that is garbage-collected
To create a buffer with a direct link to the operating system
To allocate a buffer in virtual memory
To create a buffer that supports locking

The correct answer is: To create a buffer with a direct link to the operating system

The 'allocateDirect()' method is used to create a buffer with a direct link to the operating system, bypassing the normal garbage collection process. This allows for more efficient memory management and faster data transfers. Option A is incorrect because the 'allocateDirect()' method does not create a buffer that is garbage-collected. Instead, it creates a buffer that is directly managed by the operating system. Option C is incorrect because while the buffer is allocated in virtual memory, the direct link to the operating system is what sets the 'allocateDirect()' method apart. Option D is incorrect because the 'allocateDirect()' method is not related to locking, which is used for synchronization in multi-threaded applications.