Principles of Information Systems
13th Edition
ISBN: 9781337660556
Author: Ralph Stair; George Reynolds
Publisher: Cengage Learning US
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Textbook Question
Chapter 12, Problem 13DQ
Identify and briefly discuss four key tasks associated with the successful implementation of a software package.
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Objective
Implement Bottom-Up Iterative MergeSort and analyze its efficiency compared to
recursive MergeSort. Unlike the recursive approach, which involves multiple function
calls and stack overhead, the bottom-up version sorts iteratively by merging small
subarrays first, reducing recursion depth and improving performance.
Task
1. Implement Bottom-Up Iterative MergeSort
о Start with single-element subarrays and iteratively merge them into larger
sorted sections.
Use a loop-based merging process instead of recursion.
○ Implement an efficient in-place merging strategy if possible.
2. Performance Analysis
Compare execution time with recursive MergeSort on random, nearly
sorted, and reversed datasets.
○ Measure and plot time complexity vs. input size.
O
Submission
Explain why the iterative version reduces function call overhead and when
it performs better.
•
Code implementation with comments.
•
A short report (1-2 pages) comparing performance.
•
Graph of execution time vs. input size for…
Given a shared data set, we allow multiple readers to read at the same time, and only one single writer can access the shared data at the same time. In the lecture slides, a solution is given. However, the problem is that the write cannot write forever, if there are always at least one reader.
How to ensure that the writer can eventually write? Propose your solution by using semaphores and implemented in Python
from threading import Thread, Semaphore
from time import sleep
from sys import stdout
class Reader(Thread):
def__init__(self, name):
self.n=name; Thread.__init__(self)
defrun(self):
globalnr, nw, dr, dw
whileTrue:
# ⟨await nw == 0 then nr += 1⟩
e.acquire()
ifnw>0:
#if nw > 0 or dw > 0 :
dr+=1; e.release(); r.acquire()
nr+=1
ifdr>0: dr-=1; r.release()
else: e.release()
# read data
stdout.write(self.n+' reading\n')
sleep(1)
# ⟨nr -= 1⟩
e.acquire()
nr-=1
ifnr==0anddw>0:
dw-=1 ; w.release()
else: e.release()
class Writer(Thread):
def__init__(self, name):…
Chapter 12 Solutions
Principles of Information Systems
Ch. 12.2 - Outline the tasks that must be accomplished to...Ch. 12.2 - Following your discussion, one of the team members...Ch. 12.2 - There is likely to be some confusion over the role...Ch. 12.2 - Prob. 2CTQCh. 12.3 - Prob. 1RQCh. 12.3 - Prob. 2RQCh. 12.3 - Prob. 1CTQCh. 12.3 - What other potential problems can you anticipate...Ch. 12.4 - Prob. 1RQCh. 12.4 - Prob. 2RQ
Ch. 12.4 - Prob. 1CTQCh. 12.4 - A safety-critical system is one whose failure or...Ch. 12 - Prob. 1SATCh. 12 - _______________ software can provide a better...Ch. 12 - Prob. 3SATCh. 12 - Prob. 4SATCh. 12 - The purpose of the system investigation phase is...Ch. 12 - ______________ is a diagram used to document the...Ch. 12 - The overall emphasis of the __________ phase is on...Ch. 12 - The primary tool for assessing the software...Ch. 12 - Prob. 9SATCh. 12 - Prob. 10SATCh. 12 - Prob. 11SATCh. 12 - Prob. 12SATCh. 12 - A preliminary evaluation of software packages and...Ch. 12 - Prob. 1RQCh. 12 - Prob. 2RQCh. 12 - Prob. 3RQCh. 12 - Prob. 4RQCh. 12 - Prob. 5RQCh. 12 - What are the key elements of a system...Ch. 12 - Prob. 7RQCh. 12 - Prob. 8RQCh. 12 - Prob. 9RQCh. 12 - Prob. 10RQCh. 12 - Prob. 11RQCh. 12 - Prob. 12RQCh. 12 - Prob. 13RQCh. 12 - Prob. 14RQCh. 12 - An organization has selected and is now...Ch. 12 - Prob. 1DQCh. 12 - Thoroughly discuss the pros and cons of buying...Ch. 12 - Prob. 3DQCh. 12 - Prob. 4DQCh. 12 - Prob. 5DQCh. 12 - Prob. 6DQCh. 12 - Prob. 7DQCh. 12 - Define the Pareto principle, and discuss how it...Ch. 12 - Prob. 9DQCh. 12 - Prob. 10DQCh. 12 - Prob. 11DQCh. 12 - Prob. 12DQCh. 12 - Identify and briefly discuss four key tasks...Ch. 12 - A new sales ordering system needs a relational...Ch. 12 - Prob. 2TACh. 12 - You and your team have been hired to perform a...Ch. 12 - Prob. 1WECh. 12 - Prob. 2WECh. 12 - Do research to determine the current level of...Ch. 12 - Prob. 1CECh. 12 - Prob. 2CECh. 12 - Identify an information system frequently employed...Ch. 12 - It is perhaps not surprising that Etsy was an...Ch. 12 - Prob. 2CTQ1Ch. 12 - What would be some of the criteria you would use...Ch. 12 - Prob. 1CTQ2Ch. 12 - Prob. 2CTQ2Ch. 12 - Prob. 3CTQ2
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