Mastering Java: The Ultimate Quiz for 'Thinking in Java'

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Prepare for your Java exam with our ultimate quiz based on 'Thinking in Java'. Engage with expertly crafted questions that enhance your learning process. Perfect for Java enthusiasts looking to solidify their knowledge!

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

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Which collection maintains elements in the insertion order?

HashSet
LinkedHashMap
TreeSet
PriorityQueue

The correct answer is: 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.