Answered: The running time of searching for a…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Question

The running time of searching for a specified item in a non sorted array is ____.

Question 10 options:

	O(1)
	O(n)
	O(log n)
	O(n²)

Expert Solution

Searching an element in an unsorted array

In an unsorted array, the search operation is performed by linear traversal from the first element to the last element. The array has to be searched, element by element, until the element is found or the array is completely traversed. The element can be found at the 1st position or the last position or anywhere in between or nowhere. The worst case is when the element is not present in the array. In this case, the entire array is traversed to come to this conclusion. Therefore, the running time of searching an element in an unsorted array is O(n).

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