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 CountDownLatch used for?

Data manipulation
Thread synchronization
File handling
Networking operations

The correct answer is: Thread synchronization

CountDownLatch is a class in Java that allows threads to synchronize their actions. It is commonly used in applications where multiple threads need to wait for a particular task to complete before proceeding. Options A, C, and D are incorrect because they do not involve synchronization between threads. Data manipulation involves processing and altering data, file handling involves reading and writing files, and networking operations involve communication between systems. While these may be related to overall application functionality, they do not directly involve thread synchronization, which is the main purpose of CountDownLatch.