4 processes, pl-p4, each of length 4, execute under RR. 1) pl will terminate at time 2) p4 will terminate at time needs to show your work
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![4 processes, pl-p4, each of length 4, execute under RR.
1) pl will terminate at time
2) p4 will terminate at time
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- Segmentation supports a “user view” of memory allocation for a process. True or false?In this project you are to design a process queue that is responsible for handling the process requests coming from different users. You have to take into consideration that users have different levels of privileges and priorities. Each user has an identification number and a password, in addition to process priorities. One good idea is to design the queue using an array or pointers while preserving the first-in first-out concept of the queue. For every process request received, the program should check the privileges of that request and whether it can be moved forward in the queue to be served by the operating system prior to serving the other requests. Using the programming language of your choice (preferably C+), write the process queue that would handle the user request. The program must allow for requests coming from different users or from one user.*Assume that there are three processes P1, P2, P3and P4 and four resources R1, R2, R3 and R4. The processes make the requests for resources in the following order: P1 requests R1 P2 requests R2 P3 requests R3 P4 requests R4 P1 requests R2 P2 requests R3 P3 requests R4 P4 requests R1 Assume that there is only one instance of resources R1, R2, R3 and R4. Draw a resource allocation graph and find out if the above processes will deadlock or not? and What are the four necessary conditions for a deadlock to happen?
- COPY FROM CHEGG == DISLIKE AND REPORT Assume that a finite number of resources of a single resource type mustbe managed. Processes may ask for a number of these resources and will returnthem once finished. As an example, many commercial software packagesprovide a given number of licenses, indicating the number of applications thatmay run concurrently. When the application is started, the license count isdecremented. When the application is terminated, the license count isincremented. If all licenses are in use, requests to start the application aredenied. Such a request will be granted only when an existing license holderterminates the application and a license is returned. The following program segment is used to manage a finite number of instancesof an available resource. The maximum number of resources and the number ofavailable resources are declared as follows: #define MAX_RESOURCES 5 int available_resources = MAX_RESOURCES; /** When a process wishes to obtain a number of…Assume that there are the following processes in the deadline scheduler queue: Process Arrival Runtime Period Deadline 1 0 2 12 10 2 2 4 20 16 3 4 3 15 14 Complete the following schedule so each of the processes adheres to the deadline policy by replacing a dot with a process number (as necessary): TIME: 01234567890123456789012345678901234567890123456789 PROCESS: 112222333.......................................56. In the multiprogramming system, a set of processes is deadlock if each process in the set is waiting for an event to occur that can be initialized only by another process in the set. Which of the following is not one of the four conditions that are necessary for deadlock to occur? a. nonpreemption b. process suspension c. partial assignment of resources d. circular wait
- What state is a process moved to, when it is at the head of the ready queue, and the currently running process has been moved to waiting? Orunning new waiting terminated readyWrite a c program called file1.c Program file1.c uses these: (a) fork() to launch another process. (b) exec() to replace the program driving this process, while supplying arguments to file2.c to complete its execution. (c) wait() to complete the execution of the child process. (d) file1.c takes two arguments x( a number less than 1) and n (number of terms to be added, 1 or more). For example: file1 0.5 5 (e) When the child process finishes, the parent prints: Parent(PID=yyy) : DoneAssume a binary semaphore variable, S is initialized to 1. The semaphore operations flow which is wait (S) – critical section – signal (S) has been changed. The new flow is omits the wait (S), or the signal (S), or both. What will happened in this situation? Select one: a.several processes maybe executing in their critical section b.either mutual exclusion is violated or a deadlock will occur. c.processes will starve to enter critical section
- Project Objectives: This programming project is to simulate a few CPU scheduling policies discussed in the class. You will writeC++ 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 simply print out what task is selected to run at a time. It outputs the way similar to Gantt chart style. Project Descriptions and Requirements: The selected scheduling algorithms to implement in this project are 1) First Come First Serve (FCFS), 2) Shortest Job First (SJF) and Shortest Remaining Time First (SRTF) OR , Priority and Preemptive Priority , and 3) Round Robin (RR). The detailed algorithms will be discussed in class. The task information will be entered from the keyboard. The format is process_id arrival_time, and burst_time.…Consider that we need to use semaphores to allow the below sequence of processes to execute: P4 P1 P3 P5 P2 Write the necessary semaphores and pseudocode to allow this execution sequence. Semaphores: P1 P2 P3 P4 P5The following program consists of 3 concurrent processes and 3 binary semaphores. The semaphores are initialized as S0 =1, S1= 0, S2=0 Process P0 Process P1 Process P2 wait(S0); print '0' release(S1) release (S2);} wait(S1); release(S0); wait(S2); release(S0); How many times will process P0 print ‘0’?
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