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

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Mastering Java: The Ultimate Quiz for 'Thinking in Java'. Dive deep into Java with multiple-choice questions. Challenge yourself with quiz questions designed to test and improve your understanding of the 'Thinking in Java' book. Get ready for your exam!

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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.