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!

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What method is used to calculate the number of characters in the String?

count()
calculateLength()
size()
length()

The correct answer is: length()

Explanation The method used to calculate the number of characters in a String is called length(). Option A, count(), is used to count the number of occurrences of a specific character in a String, not the total number of characters. Option B, calculateLength(), is not a predefined method in Java for String objects. Option C, size(), is used to get the number of elements in a collection, not the number of characters in a String. Therefore, option D, length(), is the correct and most appropriate method to use for finding the number of characters in a String.