plexity of quicksort to mergesort. While quicksort’s worst-case is O(n2) and mergesort’s is O(nlogn), when in practice does quicksort perform better than mergesort and vise versa?   (b) What are the trade-offs between merg

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
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(a) Compare the complexity of quicksort to mergesort. While quicksort’s worst-case is O(n2) and mergesort’s is O(nlogn), when in practice does quicksort perform better than mergesort and vise versa?

 

(b) What are the trade-offs between mergesort and quicksort besides runtime performance?

 

(c) When picking a randomized pivot for quicksort, we usually do not see its worst-case performance; however, imagine you’re a programmer who is in charge of syncing and sorting new data received from clients (uploaded from your website) into a database. What kind of attack can be derived by an adversary given they know your servers’ sorting implementation is quicksort? What can you do to minimize this risk? 

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