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 does the method 'add()' do in the context of an ArrayList?

  1. Increments the size of the ArrayList by one

  2. Inserts a new element into the ArrayList

  3. Updates an existing element in the ArrayList

  4. Deletes an element from the ArrayList

The correct answer is: Inserts a new element into the ArrayList

The method 'add()' in the context of an ArrayList inserts a new element into the ArrayList. This adds the element to the end of the list, increasing its size. Option A is incorrect because the size of an ArrayList is not incremented by calling 'add()', but rather by adding elements to the list. Option C is incorrect because 'add()' does not update existing elements, but rather adds new ones. Option D is also incorrect because 'add()' does not delete elements, but rather adds them.

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