Question 1. Process Synchronization – Message Passing Suppose there are 4 processes: A, B, C, and D. A must finish executing before B and C start. B and C must finish executing before D starts. Use message passing to synchronize processes A, B, Cand D. Use the notation send(mbox,msg) and receive(mbox,msg) to write your solution.
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A: The solution for the above-given question is given below:
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- Assume there are two dependent processes, which synchronization algorithm will you choose for the best performance? Justify? Can you choose the same algorithm if there are more than two processes?The following question is on Process Synchronization. Please do not provide a solution in code. There is a high voltage match between Manchester City and Tottenham Hotspurs on December 2. Fans of both teams are very excited about the match and they are keen to watch the match live in the stadium. Tickets for the match have almost been sold out. There are only 10 tickets left. Fans have to maintain a queue according to the first come first serve manner while purchasing tickets. In order to maintain the rule a serial number has been assigned to each who is in the queue. Serials have been assigned in 1, 2 , 3, ……………, n according to the first come first serve order. The current scenario is, there are 10 tickets available and 12 persons in the queue. And there are 2 booths for purchasing tickets. Tickets gets sold in the following order, first two persons (1 and 2 in this case) gets called to two booths together but after the purchase gets completed of person 1 then person 2 starts the…Process P0 and process P1 both want to access a shared datum, X, which is currently 0. P0 wants to add 2 to it, P1 wants to add 3 to it. Answer the following.a. Without synchronization, what value(s) can X result in?b. With synchronization, what value(s) can X result in?c. If another process, P2, was supposed to access X after P0 and P1 completed their stores, where P2 sets X to 5, would your answer to a or b change?
- How counting Semaphore and / or Binary Semaphore can be used for process synchronization. Give an example of the application.Suppose we have three processes P0, P1, and P2. Process P0 executes statement S0 and process P1 executes statement S1 and process P2 executes statement S2. Use wait and signal to ensure the following: S2 is always executed before S1 and S1 is always executed before S0S0.Can you explain what the P (decrement/wait) and V (increment/signal) operations do to a semaphore? The V operation will check the value of the semaphore and decrement it if it is greater than 0. The V operation will check the value of the semaphore and signal a waiting process if the semaphore is greater than 0. The V operation will check the value of the semaphore and signal a waiting process if the semaphore is equal to 0. The V operation will check the value of the semaphore and decrement it if it is less than 0. ----------
- Give one scenario when you prefer to use memory sharing as a means of IPC. Explain why? How can you resolve the issue that could occur if the mailbox is used to communicate between three processes P1, P2 and P3, given one message is kept in the mailbox by the sender?3:43 0.00 VOp :4G .l (66 KB/S LTED Job status Job Factory Job Contorler Job User auth Restart Сopy Scan Print Get job status Actor Database Draw a conceptual architecture for an application to control printers. These were the requirements: The software handle different jobs : • Print • Scan • Copy • Restart The printer can handle one job at a time, however, users still can send an order to execute jobs for the printer while it is running. The printer will handle the jobs sequentially based on job schedule details which are: 1. User can schedule a job to run now 2. User can set time to run job, like restart tomorrow at 12:00 3. Users can create a recurring Job which is set to automatically repeat based on the job schedule. Only authorized users should be able to submit a job. The user should be able to get a status or result for their job. The screen below shows the conceptual architecture. We created a job component that contains an interface called job and other operations that…This question is on Process Synchronization in Operating Systems. You need to read the following scenario and find out which Process Synchronization method it resembles with. There are 3 washrooms for men and one for women. Only one person can enter a restroom at a time. When a person leaves the washroom, another person is allowed to enter the washroom. When they are not using the washroom, they are not doing anything. Men are not allowed to use the female washroom. So on a fine rainy day, 9 men arrived and 3 men were allowed to enter the 3 washrooms at a time. They were not allowed to use the female washroom even though it was vacant. What Process Synchronization method has been used here? A) Producer-Consumer B) Readers-Writers C) Dining Philosophers
- 4. Calculate the Wait time, Avg Wait time, Finish time and completion Time for the following Process using SJF algorithm Process Burst time Queue P1 8 P2 12 P3 6 P4 P5 44. Explain the code. Which process will execute first and why? semaphore s = 0; //Shared P1 { P2 { /* some code */ /* some code */ Wait(s); Signal (s); /* do some more code */ /* do some more code */ Answer1. In the Remote Procedure Call (RPC): a. The two processes reside in same machine. b. Each process has own stub. c. The two processes provide services together. d. All above true. e. Nothing of that. Answer: 2. The long-term scheduler takes a place in: a. Waiting-Ready transition. b. Running-Terminated transition. c. New-Ready transition. d. B+ C. E e. A+ C. Answer: