I. What is the use of a process table in program execution? II. What is the...
The VAX/ VMS operating system makes use of four processor access modes to facili-tate the protection and sharing of system resources among processes. The access mode determines:• Instruction execution privileges: What instructions the processor may execute• Memory access privileges: Which locations in virtual memory the current instruc-tion may access The four modes are as follows:• Kernel: Executes the kernel of the VMS operating system, which includes memo-ry management, interrupt handling, and I/ O operations• Executive: Executes many of the operating...
A system consists of 1 CPU, 1 Disk, and 1 Network Interface. A web server running on this system consists of a process that waits for an HTTP request. Once the request is received, the process services it by fetching the requested file from disk (an I/O operation) and then by sending the file content to the client. Assume that serving a request consists of the following phases: i. Process uses the CPU for 2 msec (parse request) // CPU...
Write a C program for: One technique for dealing with deadlock is called “detect and recover.” In this scheme, some procedure is used to identify when a deadlock occurs, and then another procedure is used to deal with the blocked processes. One technique to identify a deadlock is to maintain a resource graph that identifies all processes, all resources, and the relationships between them (that is, which processes exclusively own which resources, and which processes are blocked waiting for which...
This is for a Unix class. Please help me out. I am attaching a skeletal code of the program below, it just needs ti be filled in. Below is a skeletal code of the program. Fork a child process and then use the parent for reading and the child for writing. This is just a way of sending and receiving messages asynchronously. /* ************************************************************* * Utility functions * ************************************************************** */ static void usageError(const char * progName, const char *msg) {...
scheduling program in C, please help 1 Objectives This programming project is to simulate a few CPU scheduling policies discussed in the class. You will write a C program to implement a simulator with different scheduling algorithms. The simulator selects a task to run from ready queue based on the scheduling algorithm. Since the project intends to simulate a CPU scheduler, so it does not require any actual process creation or execution. When a task is scheduled, the simulator will...
Part I – Process and Capacity Analysis Mortgage, Inc. processes loan applications in a “back-office” service facility. Each loan application must undergo a sequence of three separate processing activities before Mortgage, Inc. can make a decision to approve or decline the application. That is, a loan application first passes through Activity 1, then Activity 2, and finally Activity 3. Each activity has a fixed number of workers (given below). For example, there are three workers assigned to Activity 1 and...
I have done the a and b, but i'm so confuse with other questions, could someone help me to fix these questions, thanks so much. 4 Directed graphs Directed graphs are sometimes used operating systems when trying to avoid deadlock, which is a condition when several processes are waiting for a resource to become available, but this wil never happen because Page 2 p2 T2 Figure 1: Minimal example of a resource allocation graph with deadlock other processes are holding...
I have the following code....from the previous lab....the above needs to be added to what is already existing. ALSO MODIFY SEMAPHORES TO USE pthreads instead of the pipe constructs P() & V() #include <stdio.h> #include <string.h> #include <sys/types.h> #include <unistd.h> #include <sys/wait.h> #include <stdlib.h> #include <sys/stat.h> void printStat(char *filename); //Main int main(int argc, char *argv[]) { //Process Id (storing) pid_t pid; int j; //printf("Welcome to Project Three\n”); // For loop*/ for (j = 1; j...
Scenario: Disability Insurance Claims Handling at InsureIT We consider the following business process for handling insurance claims for disability insurance[1] at an insurance company InsureIT. The process starts when a customer lodges a disability claim. To do so, the customer fills in a form including a 2-page questionnaire describing the disability. The customer can submit the form physically at one of the branches of InsureIT, by postal mail, fax or simply via e-mail (digitally-signed document). When a claim is received,...
Exercise 4.31 Draw a collaboration diagram for the following booking-to-cash (please draw business process) process. Fotof provides photography services in the fields of family photography, personal event photography (e.g. weddings and party photography) and commercial photography (e.g., corporate events). One of the core processes of Fotof is its booking-to-cash process, which goes all the way from the moment a customer makes a booking for a photo shooting session, through the order placement, to the moment the customer pays and obtains...