Mastering Java 2026 – 400 Free Practice Questions to Pass the 'Thinking in Java' Exam

Question: 1 / 510

What is the role of the List interface?

To map keys to values

To maintain elements in a specific sequence

The List interface is used to maintain elements in a specific sequence. This means that the order in which the elements are added to the list is preserved and can be retrieved in the same order. This is not the role of mapping keys to values (option A) as that is the role of the Map interface. Ensuring no duplicate elements (option C) is not the primary role of the List interface, although some implementations may enforce this rule. The List interface does not specifically allow for adding or removing elements at both ends (option D), although certain implementations like LinkedList do support this feature. Therefore, option B is the best answer as it accurately describes the main function of the List interface.

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To ensure no duplicate elements

To add or remove elements at both ends

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