Ace Java 2025: Rock Your 'Thinking in Java' Challenge!

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What is the primary feature of a HashMap over a TreeMap?

HashMap maintains elements in insertion order

HashMap keeps its elements sorted

HashMap is optimized for rapid access

A HashMap is a data structure that stores key-value pairs and is designed for fast access and retrieval. Unlike a TreeMap, which keeps its elements sorted, the elements in a HashMap are not sorted by default. This means that the elements in a HashMap do not have a particular order and cannot be accessed sequentially. Additionally, HashMaps are optimized for rapid access, meaning that they are more efficient at retrieving and storing data compared to TreeMaps. This is because HashMaps use a hashing function to quickly calculate the storage location for each key-value pair, while TreeMaps use a tree data structure that requires more comparisons and operations to insert, retrieve, and sort data. Therefore, the primary feature of a HashMap over a TreeMap is its efficiency in accessing and retrieving data.

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HashMap elements can be accessed sequentially

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