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.

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What does ArrayList allow you to do with elements?

  1. Look up an object using a number

  2. Insert duplicates without any restriction

  3. Only store elements of the same type without generics

  4. Execute methods specific to ArrayList only

The correct answer is: Look up an object using a number

An ArrayList allows you to look up an object using its index number. Option B is incorrect because each element in an ArrayList must be unique. Option C is incorrect because you can specify the data type of the elements in an ArrayList using generics, allowing for different types of elements to be stored. Option D is also incorrect because although ArrayList has its own methods, it can also use methods from the List interface.

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