Answered: We are going to create a poorly…

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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We are going to create a poorly efficient sort which we will call Sort. This algorithm will arrange the elements in an array in descending order. Given some array A, we are going to start by finding the largest element in the array and then swapping it with the first element of the array A[O]. We will then find the next largest element of the array and swap it with A[1]. This procedure will be repeated until we reach A.length - 2. I am really struggling with the pseudo code for this algorithm. I figured out how to do it in descending order waiting confused by the part where it instructs us to find the largest element in the array and then swap it. I have included a picture of my work so far. If you could also help me with the loop invariant steps That would be much appreciated. These are practice questions for our upcoming quiz

rect. We
Loop Invariants
We are going to create a poorly efficient sort which we will call UA Sort. This algorithm
will arrange the elements in an array in descending order. Given some array A, we are
going to start by finding the largest element in the array and then swapping it with the
first element of the array A[0]. We will then find the next largest element of the array
and swap it with A[1]. This procedure will be repeated until we reach A.length - 2 (the
second to last element).
1. Design the algorithm based on the description provided above.
INSERTION-UA
SORT (A)
1. for j= A[o] to A.length
2. VicKey= A[S]
3. // // Insert A[s] into sorted Sequence A[0...j-2]
4.
5.
6
7.
8.
i=j-2
while i>0 and A[i]<key
A[i+1] = A[i]
i=i-1
A[i+1]=key
2. Complete the loop invariant for this algorithm.
(a) Initialization:
(b) Maintenance:
(c) Termination:
1
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