Mastering Java: The Ultimate Quiz for 'Thinking in Java' 2025 - Free Java Programming Practice Questions and Study Guide

Question: 1 / 510

Which collection maintains elements in the insertion order?

HashSet

LinkedHashMap

The other options, HashSet, TreeSet, and PriorityQueue, have no inherent order in which the elements are maintained. So, insertion order wouldn't be a factor in those collections. LinkedHashMap, on the other hand, implements the Map interface and uses a combination of a doubly-linked list and a hash table to maintain the entries in a predictable order based on the order of insertion. Therefore, elements are maintained in the insertion order in a LinkedHashMap.

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TreeSet

PriorityQueue

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