On my bookshelf of paper books, I have a dictionary that consists of multiple volumes, each of which is a book. One covers A-E, another F-J, another K-M, and so on. To find a word, I look at the alphabetic ranges to find the right volume. Then I use the ranges at the top of each page to turn to the proper page. Then I find the word on the page. What is this most like?

Question options:

A. Multi-level Indexes

B. Secondary indexes

C. None the above

A. Multi-level Indexes

Explanation:

Multi-level indexes are deep level arrays like arrays in an array. For example how we would have ripped in an array. If we select a particular element in that array, that array holds another array as we would have in the dictionary volumes that hold pages with their own indexes. If a volume A-F is an element in array then it holds pages 1,2,3,4...etc in that order.