We discussed several Linked List Variations, each of which was more complex than the one preceding it, but that was able to do certain things asymptotically faster than the simpler variants could. This isone of many examples we'll see this quarter where we make a classic tradeoff in computing: using more memory (and, correspondingly, more complexity for managing what it's in it) in an effort to spend lesstime. While it's not always true that we can make things faster by using more memory, it's not at all uncommon to see these two things be on opposite sides of a tradeoff.One of the linked list variants we saw was a singly-linked list with head and tail pointers. Let's consider where this variant fell short and whether there are other ways to improve it besides what we saw.1. Why isn't the presence of a tail pointer enough to allow us to remove the last node in the list in O(1) time?2. Suppose that we added a third list-level pointer (i.e., outside of the nodes) called before Tail, which always pointed to the second-to-last node in the list. Would we now be able to remove the last nodein the list in O(1) time?

One of the linked list variants we saw was a singly-linked list with head and tail pointers. Let's consider where this variant fell short and whether there are other ways to improve it besides what we saw. 1. Why isn't the presence of a tail pointer enough to allow us to remove the last node in the list in O(1) time? 2. Suppose that we added a third list-level pointer (i.e., outside of the nodes) called before Tail, which always pointed to the second-to-last node in the list. Would we now be able to remove the last node in the list in 0(1) time?

One of the linked list variants we saw was a singly-linked list with head and tail pointers. Let's consider where this variant fell short and whether there are other ways to improve it besides what we saw. 1. Why isn't the presence of a tail pointer enough to allow us to remove the last node in the list in O(1) time? 2. Suppose that we added a third list-level pointer (i.e., outside of the nodes) called before Tail, which always pointed to the second-to-last node in the list. Would we now be able to remove the last node in the list in 0(1) time?

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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