15. If a queue is implemented under an ArrayList, how much time does a queue add an item? а. О(1) b. 0(n) с. 0(n?) d. 0(log n)
15. If a queue is implemented under an ArrayList, how much time does a queue add an item? а. О(1) b. 0(n) с. 0(n?) d. 0(log n)
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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Transcribed Image Text:**Question 15:**
If a queue is implemented under an ArrayList, how much time does a queue add an item?
- a. O(1)
- b. O(n)
- c. O(n²)
- d. O(log n)
Expert Solution

Step 1
Explanation:
- To add an item to the ArrayList takes O(1) time.
- Because, we just add the element to beginning of the list.
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