For the following processes, draw the gantt chart and calculate the average waiting time for SJF policy and FCFS. Process Arrival Time Burst Time P1 P2 P3 0.0 5 2.0 10 4.0 13 P4 5.0 3
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- Calculate average wait time for the following situation.If the system fails repeatedly during recovery, what is the maximum number of log records that can be written (as a function of the number of update and other log records written before the crash) before restart completes successfully?Three of the mentors started writing notes for the CS Subjects and before they started they had set a target to finish the work on a certain date. But due to some important work these mentors had to take leave, which resulted in the delay of 3 days from the target date to be finished. Mentor A took 2 days more leave than that of Mentor C and Mentor B took 4 days more leave than that of Mentor C. What is the total number of days for which Mentor C was on leave?
- Table 1. 4 processes arriving shown in Operating System Scheduling PDF for Shortest Job Next, non- preemptive Process Arrival Times Execution Times Service Times sequence Wait Times calculations PO 0 12 P1 21 9 P2 41 6 P3 6 3 Total wait time = ? Here the 4 processes of the PDF are repeated in Table 1, with arrival times changed to 0, 2, 4, and 6 respectively. Also, the execution times are changed to 12, 9, 6, and 3. You will be asked to fill table 1 with the numbers like the service times (when is each process serviced), the sequence of executions of these 4 processes in part (a) and part (b) below. Also, you will compute the total wait time. Note for FCFS, it is 1, 2, 3, 4 for P0, P1, P2, and P3; • for the SJN or Shortest Job Next with non-preemptive, PO is #1, P1 may not be #2; for SRT, or shortest remaining time, the preemptive version of SJN, PO is #1, but after 2 time units when P1 comes, P1 kicks out PO since its execution time is 4 < 9- 2 = 7; and P1 may be preempted by P2 later…1) Holiday Inn hires you to examine three hotel locations that can each use some updating. They have $4 million available for the updates. The future revenue projected for each hotel is tied to how much renovation is done, according to the following table: Renovation Amount Future Revenue (in millions) (in millions) $0 $1 $2 $3 Hotel A Hotel B Hotel C $4 $7 $8 $9 $3 $6 $10 $12 $14 $3 $7 $8 $13 $4 $11 $15 Use dynamic programming to determine how to best allocate the $4 million in renovations between the three hotels (assume you can only use $1 million increments).Given SS = 0.75, S1 = 0.4, and Site Class C, find SDS (use the tables in the book and make no additional considerations)
- Complete the table above (ii) Determine the average time spent in the system for the single server illustrated by the table (iii) Find the average waiting time for the customers in the queueTyler Richardson set up a house alarm system when he moved to his new home in Seattle. For security purposes, he has all of his mail, including his alarm system bill, mailed to his local UPS store. Although the alarm system is activated and the company is aware of its physical address, Richardson receives repeated offers mailed to his physical address, imploring him to protect his house with the system he currently uses. What do you think the problem might be with that company’s database(s)?Assume that a process calls fork() to create a new process. The parent process has PID 500 and the child process has PID 510. What were the exact values returned by fork() to each process? Parent's return value from fork(): Child's return value from fork():
- Use the 20 year Global Warming Potential (GWP) values in the first Table to calculate an equivalent CO2 emission rate for worldwide greenhouse gas emissions as given in the second table. Assume that total CFCs are divided equally among the three compounds listed. What is the percentage contribution of actual CO2 emissions to the total equivalent CO2? What is the next most important greenhouse gas emission based on this analysis? How do these results compare to those using the 100-year GWP.6. What is the percentage increase in the number of requests served (totaled over both sites), relative to the original single-site service? (A) (B) (C) (Đ) (E) 55% 65% 75% 85% 95% Gargle is considering a different alternative, which is te ereato a mirror site server as proposed before, but to keep this invisible to the user. That is, the user will still submit the request as with the original single-site interface, but requests will be automaticaily routed to whichever site becomes available first. (The automatic routing is instantaneous.) As hypoinesized earlier, customer traffic will increase until a second average search completion time results. (note: To analyze this scenario you will need to solve c hon-linear equation. You can do this in-any number of ways, including Goal Seek or Solver in MS Excel. You will not be required to èxecute this kind of calculation on an exam since computers are ne allowed, but the underlying logic of the question is fair game.) 1. What is the…When the MTTR drops to zero, what does that mean for availability? Is it possible to accurately describe the situation?