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

Question: 1 / 510

When should you use an ArrayList over a LinkedList?

For frequently updating elements in the middle of the list

For rare insertions and deletions

For frequent random access

An ArrayList is more efficient for frequent random access because it stores data in a continuous block in memory, allowing for faster index-based retrieval. A LinkedList, on the other hand, stores data in nodes that are linked together, making it more efficient for insertions and deletions at the beginning or end of the list. Therefore, options A and B are incorrect. Option D is also incorrect because both ArrayList and LinkedList have similar memory usage. Therefore, the correct answer is C.

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When memory usage is a concern

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