Computer Systems: A Programmer's Perspective (3rd Edition)
Computer Systems: A Programmer's Perspective (3rd Edition)
3rd Edition
ISBN: 9780134092669
Author: Bryant, Randal E. Bryant, David R. O'Hallaron, David R., Randal E.; O'Hallaron, Bryant/O'hallaron
Publisher: PEARSON
bartleby

Concept explainers

Question
Book Icon
Chapter 8, Problem 8.9HW
Program Plan Intro

Given:

ProcessStart timeEnd Time
A57
B24
C36
D18

Expert Solution & Answer
Check Mark

Explanation of Solution

Determine whether the pair of processes run concurrently or not:

Diagram for processes AB:

Computer Systems: A Programmer's Perspective (3rd Edition), Chapter 8, Problem 8.9HW , additional homework tip  1

Explanation:

  • In the above timing diagram, process “A” starts with “5” and end with “7”.
  • Process “B” starts with “2” and end with “4”.
  • Process “A” and “B” are not concurrent with respect to each other because their corresponding executions do not overlap, that is, process “A” completes before process “B” starts.

Therefore, the processes “AB” are do not run concurrently.

Diagram for processes AC:

Computer Systems: A Programmer's Perspective (3rd Edition), Chapter 8, Problem 8.9HW , additional homework tip  2

Explanation:

  • In the above timing diagram, process “A” starts with “5” and end with “7”.
  • Process “C” starts with “3” and end with “6”.
  • Process “A” and “C” are concurrent with respect to each other because their corresponding executions overlap, that is, process “C” starts before the process “A” completes.

Therefore, the processes “AC” are run concurrently.

Diagram for processes AD:

Computer Systems: A Programmer's Perspective (3rd Edition), Chapter 8, Problem 8.9HW , additional homework tip  3

Explanation:

  • In the above timing diagram, process “A” starts with “5” and end with “7”.
  • Process “D” starts with “1” and end with “8”.
  • Process “A” and “D” are concurrent with respect to each other because their corresponding executions overlap, that is, process “D” starts before the process “A” completes.

Therefore, the processes “AD” are run concurrently.

Diagram for processes BC:

Computer Systems: A Programmer's Perspective (3rd Edition), Chapter 8, Problem 8.9HW , additional homework tip  4

Explanation:

  • In the above timing diagram, process “B” starts with “2” and end with “4”.
  • Process “C” starts with “3” and end with “6”.
  • Process “B” and “C” are concurrent with respect to each other because their corresponding executions overlap, that is, process “C” starts before the process “B” completes.

Therefore, the processes “BC” are run concurrently.

Diagram for processes BD:

Computer Systems: A Programmer's Perspective (3rd Edition), Chapter 8, Problem 8.9HW , additional homework tip  5

Explanation:

  • In the above timing diagram, process “B” starts with “2” and end with “4”.
  • Process “D” starts with “1” and end with “8”.
  • Process “B” and “D” are concurrent with respect to each other because their corresponding executions overlap, that is, process “D” starts before the process “B” completes.

Therefore, the processes “BD” are run concurrently.

Diagram for processes CD:

Computer Systems: A Programmer's Perspective (3rd Edition), Chapter 8, Problem 8.9HW , additional homework tip  6

Explanation:

  • In the above timing diagram, process “C” starts with “3” and end with “6”.
  • Process “D” starts with “1” and end with “8”.
  • Process “C” and “D” are concurrent with respect to each other because their corresponding executions overlap, that is, process “D” starts before the process “C” completes.

Therefore, the processes “CD” are run concurrently.

Completed table:

Process pairConcurrent?
ABNo
ACYes
ADYes
BCYes
BDYes
CDYes

Want to see more full solutions like this?

Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!
Students have asked these similar questions
I would like to get help to resolve the following case
Last Chance Securities The IT director opened the department staff meeting today by saying, "I've got some good news and some bad news. The good news is that management approved the payroll system project this morning. The new system will reduce clerical time and errors, improve morale in the payroll department, and avoid possible fines and penalties for noncompliance. The bad news is that the system must be installed by January 1st in order to meet new federal reporting rules, all expenses from now on must be approved in advance, the system should have a modular design if possible, and the vice president of finance would like to announce the new system in a year-end report if it is ready by mid-December." Tasks 1. Why is it important to define the project scope? How would you define the scope of the payroll project in this case? 2. Review each constraint and identify its characteristics: present versus future, internal versus exter- nal, and mandatory versus desirable. 3. What…
2. Signed Integers Unsigned binary numbers work for natural numbers, but many calculations use negative numbers as well. To deal with this, a number of different methods have been used to represent signed numbers, but we will focus on two's complement, as it is the standard solution for representing signed integers. 2.1 Two's complement • Most significant bit has a negative value, all others are positive. So, the value of an n-digit -2 two's complement number can be written as: Σ2 2¹ di 2n-1 dn • Otherwise exactly the same as unsigned integers. i=0 - • A neat trick for flipping the sign of a two's complement number: flip all the bits (0 becomes 1, or 1 becomes 0) and then add 1 to the least significant bit. • Addition is exactly the same as with an unsigned number. 2.2 Exercises For questions 1-3, answer each one for the case of a two's complement number and an unsigned number, indicating if it cannot be answered with a specific representation. 1. (15 pts) What is the largest integer…
Knowledge Booster
Background pattern image
Computer Science
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, computer-science and related others by exploring similar questions and additional content below.
Similar questions
SEE MORE QUESTIONS
Recommended textbooks for you
Text book image
Systems Architecture
Computer Science
ISBN:9781305080195
Author:Stephen D. Burd
Publisher:Cengage Learning
Text book image
Microsoft Visual C#
Computer Science
ISBN:9781337102100
Author:Joyce, Farrell.
Publisher:Cengage Learning,
Text book image
Programming Logic & Design Comprehensive
Computer Science
ISBN:9781337669405
Author:FARRELL
Publisher:Cengage
Text book image
C++ Programming: From Problem Analysis to Program...
Computer Science
ISBN:9781337102087
Author:D. S. Malik
Publisher:Cengage Learning
Text book image
Operations Research : Applications and Algorithms
Computer Science
ISBN:9780534380588
Author:Wayne L. Winston
Publisher:Brooks Cole
Text book image
EBK JAVA PROGRAMMING
Computer Science
ISBN:9781337671385
Author:FARRELL
Publisher:CENGAGE LEARNING - CONSIGNMENT