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!

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What data structure is used to represent the key information in hashing?

Linked list
Binary search tree
Array
Stack

The correct answer is: Array

An array is used to represent key information in hashing because it is able to generate a unique index for each key, allowing for constant time lookup and insertion of key-value pairs. The other options, such as linked lists, binary search trees, and stacks, do not have the same efficient lookup and insertion times and do not provide a unique index for each key. Linked lists have linear time lookup, binary search trees have log time lookup, and stacks do not provide a key-value pair structure. Therefore, an array is the most suitable data structure for efficiently representing key information in hashing.