Database System Concepts
Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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The running time for the ____ method is O(1) for Array  implementation.

 

Question 12 options:

 

__str__

 

__getitem__(index)

 

pop(index)

 

insert(index, item)

Expert Solution
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Step 1

In insert(index, item) method, the pointer traverse from 0th position to specified index and then the element is inserted at that index and as it involved checking each element its complexity is of order  O(n)

 

In pop(index) method, the pointer is traversed to that index and then the element is deleted and as it involved checking each element its complexity is of order  O(n)

 

In __getItem__(index method), the pointer traverse from 0th position to specified index and then the element is at that index is returned and as it involved checking each element its complexity is of order  O(n)

 

The general implementation of __str__ method is to represent the object in a meaningful way and it simply returns a string and it is a single step and thus complexity is of order O(1)

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