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14. If a queue is implemented under an ArrayList, how much time does a queue remove an item ? a. 0(1) b. 0(n) c. O(n2) d. 0(log n)

14. If a queue is implemented under an ArrayList, how much time does a queue remove an item ? a. 0(1) b. 0(n) c. O(n2) d. 0(log n)

Database System Concepts
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 14:** If a queue is implemented under an ArrayList, how much time does a queue remove an item? - a. O(1) - b. O(n) - c. O(n²) - d. O(log n) **Explanation:** When a queue is implemented using an ArrayList, removing an item typically involves shifting all subsequent elements one position to the left. This operation has a time complexity of O(n), where n is the number of elements in the queue. Therefore, the correct answer is **b. O(n)**.
Transcribed Image Text:**Question 14:** If a queue is implemented under an ArrayList, how much time does a queue remove an item? - a. O(1) - b. O(n) - c. O(n²) - d. O(log n) **Explanation:** When a queue is implemented using an ArrayList, removing an item typically involves shifting all subsequent elements one position to the left. This operation has a time complexity of O(n), where n is the number of elements in the queue. Therefore, the correct answer is **b. O(n)**.
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