Q-1: Draw the Shortest Remaining Time First (with Preemption) and Round Robin (no Preemption) Gannt chart for the following processes. Calculate average wait time for each algorithm using the processes data below. Round Robin uses a time quanta of 3. Process Number PH2RER PO P1 P3 P4 P5 Arrival Time Burst Time to Complete 10 0 3 4 13 25 26 2 6 10 1 3

Q-1: Draw the Shortest Remaining Time First (with Preemption) and Round Robin (no Preemption) Gannt chart for the following processes. Calculate average wait time for each algorithm using the processes data below. Round Robin uses a time quanta of 3. Process Number PH2RER PO P1 P3 P4 P5 Arrival Time Burst Time to Complete 10 0 3 4 13 25 26 2 6 10 1 3

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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For Heap File with a page directory, assume that a page can contain up to 100 directory entries and a page can contain 1000 records, for a file of 1,000,000 records, what is the number of pages to store these records, assuming that on average data pages are filled up 70%? With this data page utilization, what is the number of pages to store the directory, assuming that each directory page is full? Assuming both the directory and the file are stored on disk, what is the I/O cost to insert one record in worst case, and in the average case?
5- Three processes P1, P2 and P3 have Process(arrival time, execution time) as follows. P1(0,7), P2(2,4), P3(3,1). Find the average waiting time for these processes if they are scheduled as Shortest Remaining Time First.
Use RMS and EDF to schedule the real-time processes in the table below. Draw and compare the scheduling charts for RMS and EDF. Which algorithm is the best for this case? Why? Period Execution Deadline Process time t d A 20 10 -p (20) 50 25 -p (50)
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Task 1: SJF Scheduling with preemption You can use the following input as sample: 22222 Proc P1 P5 Process P1 P2 P3 P4 Solution in a Gantt chart: P1 P2 P3 AT 3 4 P4 5 18 20 P5 Sample Output Structure: P2 3 P2 BT CT 8 22 5 18 6 20 3 27 3 28 Arrival Time 4 Grant Chart: Pl P5 P2 P1 P5 P2 0 WT 11 9 9 6 5 2 3 4 5 P1 TAT 19 14 15 9 8 7 P1 2 Average waiting time: 8.0 Average turnaround time: 13.0 **Output values are random and do not match the given input. P4 11 Burst Time P5 5 2 7 4 5 16 P3 23 P5 P2 P1 P3 P4 P3 P4
Do the Shortest Remaining Time First scheduling algorithm to the list of processes. The process should provide : a. A detailed gantt chart b. finish time, turnaround time, waiting time c. The average turnaround time d. The average waiting time
Jobs Arrival Time Burst P1 0.0 25 P2 3.0 10 P3 10.0 5 p4 15.0 15 Algorithms: Shortest remaining time first , First come first served, Round robin(quantum =5) Calculate the average waiting time for each of these algorithm for the given jobs. Which one offers the shortest waiting time?
The Answer to the given question is provided at the end of the question. I need you to show the full solution to get the given answer. Show all steps where necessary. Given memory partitions of 200k, 150k, 80k, and 350k (in order, top to bottom), apply first fit, best fit, and worst fit algorithms to place processes with the space requirement of 170k, 120k, 185k, and 125k (in order). Which algorithm makes the most effective use of memory? Answer: Worst fit is most effective for the scenario.
The logical clock timestamp scheme presented in this chapter provides the following guarantee: If event A happens before event B, then the timestamp of A is less than the timestamp of B. Note, however, that one cannot order two events based only on their timestamps. The fact that an event C has a timestamp that is less than the timestamp of event D does not necessarily mean that event C happened before event D; C and D could be concurrent events in the system. Discuss ways in which the logical clock timestamp scheme could be extended to distinguish concurrent events from events that can be ordered by the happens-before relationship.
Similar to, use the same approach to compute pi using mpi4py. As previously, the worker process identifies the region under the function 1+x2 for its associated portion. The number of processes is broadcast to all workers, who may then calculate their parts using the function calc pi. The root process then adds all of the results from the workers using the reduce operation and outputs the result. It is worth noting that in the reduction operation, we may indicate what to do with the obtained data.