Use semaphores to solve the barrier problem where 6 processes execute the same code shown below. No process should be able to execute the statement "critical point" until all processes have executed the statement "rendezvous". (Hint: define semaphore mutex, semaphore barrier and a variable count). Process rendezvous critical point
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- 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.What happens if a process calls wait before it has called fork, i.e., it has no children? Bespecific (indicate which error is returned).A parent process calls fork creating a child and continues running but does not call wait. The child calls fork itself and immediately exits (without calling wait), while it's child (the grandchild of the first process) continues running. At this point which of the following correctly describes the situation. The child and the grandchild both become orphans. The child becomes and orphan and the grandchild becomes a zombie. The child becomes a zombie and the grandchild becomes an orphan. The child and the grandchild both become zombies.
- Which example uses the SOLID SRP principle correctly and does not violate it? (A or B) A. public class DatabaseParser { ParseDirectoryMapFile(); // parse directory map fileParsePasswordFile(); // parse user fileParseReviewDataFile(); // parse review data fileParseTeamFile(); // parse team CalculateGrade(); CalulateRelativeGrade(); } B public class DatabaseParser { ParseDirectoryMapFile(); // parse directory map fileParsePasswordFile(); // parse user fileParseReviewDataFile(); // parse review data fileParseTeamFile(); // parse team file} // seperately with the following: public class Calculator{ CalculateGrade(); CalulateRelativeGrade(); }In this question you will be considering the development of a platform through which people working from home can monitor and control machines such as 3D printers, working in a factory. i. You are provided with the following requirement. "User can select a 3D model file from a list and add it to a queue for one of the printers." Write out a step-by-step process that a tester can use to test this requirement. ii. Write TWO requirements for the monitoring part of the platform, using the EARS syntax.You are required to make changes in the above programs and introduce the use of compaction where required. Write code to simulate Worst-Fit Algorithm TASK2: DESCRIPTION One of the simplest methods for memory allocation is to divide memory into several fixed-sized partitions. Each partition may contain exactly one process. In this multiple-partition method, when a partition is free, a process is selected from the input queue and is loaded into the free partition. When the process terminates, the partition becomes available for another process. The operating system keeps a table indicating which parts of memory are available and which are occupied. Finally, when a process arrives and needs memory, a memory section large enough for this process is provided. When it is time to load or swap a process into main memory, and if there is more than one free block of memory of sufficient size, then the operating system must decide which free block to allocate. Best-fit strategy chooses the block…
- You are required to make changes in the above programs and introduce the use of compaction where required. Write code to simulate Worst-Fit Algorithm TASK2: DESCRIPTION One of the simplest methods for memory allocation is to divide memory into several fixed-sized partitions. Each partition may contain exactly one process. In this multiple-partition method, when a partition is free, a process is selected from the input queue and is loaded into the free partition. When the process terminates, the partition becomes available for another process. The operating system keeps a table indicating which parts of memory are available and which are occupied. Finally, when a process arrives and needs memory, a memory section large enough for this process is provided. When it is time to load or swap a process into main memory, and if there is more than one free block of memory of sufficient size, then the operating system must decide which free block to allocate. Best-fit strategy chooses the block…Using Django Project (with a python syntax) make a bookstore wishlist program with the following criteria: Users can create and maintain 3 different wish lists which can have books moved tofrom the primary list. API Actions: - Create a wishlist of books that belongs to user. The books must haveunique names- Add a book to a user’s wishlisht- Remove a book from a user’s wishlist and place a book into the user’sshopping cart- List the book in a user’s wishlistusing c++ In this assignment you are going to implement your own version of university library system,Thesystem will have two different sides , the first one is to help the librarian to do his job and the other side for admin to manage every one permissions in the system , so You should provide the following features in your system: Admin view o Add/remove Studentso Add/remove librarian o Add/remove other admins Librarian viewo Add/Delete bookso Issue/Return bookso View bookso View Issued bookso Log in /log outo Search for the book(id/name) Simple backend for your system , You could use a file each row should represent itemo Books File should be something like:Id , Book Name, Author Name, Available quantity, Issued Quantity1,Oliver Twist, Charles Dickens,98,2In the previous the first row was the name of each column , you can do that or handle it in your code , id =1 , Book Name =Oliver Twist ..Etc. Tables neededo Books Id Book Name Author Name Available quantity Issued…
- Mutual Exclusion: Select all of the following statements that are true. The Peterson Algorithm does not rely on the mechanism of busy waiting. The Peterson Algorithm is a purely software-based solution to the mutual exclusion problem. The only way to guarantee the atomicity of operations is to disable interrupts. Mutex Locks are an API offered by operating systems to protect critical sections. In order to enter a critical section protected by Mutex Locks, the release() operation must be executed first. The test_and_set instruction is atomic.Write a C program which creates two childprocesses. One of the child processes mustopen data1.txt and fill it with 10 randomintegers (0-9). The other child process mustopen data2.txt and fill it with 10 randomletters (a-z). In the meanwhile, parent mustprint both child processes' id's and wait forthem to finish.We are trying to find out more information about the GET-PROCESS: What cmdlet can we run if we want to access the help file of GET-PROCESS with more than just the basic default information, and it will show which parameter is required. What cmdlet can we run if we want to view the online version of the help file of GET-PROCESS. What cmdlet can we run if we want to find out if there is an Alias for GET-PROCESS. What cmdlet can we run if we want to display a GUI pop up window for GET-PROCESS that allows us to run/copy the cmdlet. Please write down the complete cmdlet with all required parameters and switchparameters.