FCFS Disk Scheduling algorithm

//I) Consider a disk queue with requests for I/O to blocks on cylinders 98, 183, 41, 122, 14, 124, 65, 67. The head is initially at cylinder number 53 moving towards larger cylinder numbers on its servicing pass. The cylinders are numbered from 0 to 199.//Write an OS program to implement FCFS Disk Scheduling algorithm to calculate the total head movement (in number of cylinders).//Solution:#include<stdio.h>int front,rear;void init(){ front=rear=-1;}void display(int *Q){ int i; for(i=front;i<=rear;i++) printf("\t%d",Q[i]);}void enqueu(int...

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Python Programming Laboratory

 Savitribai Phule Pune University, M.Sc. (Computer Application) (Semester-III) Practical Examination Solved Slips.M.Sc. (Computer Application)Python Programming LaboratorySolved Sl...

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OS-(I) Assignment 4: Demand Paging and Page Replacement Algorithms

NEW. Set A. (1) Write the simulation program to implement demand paging and show the page scheduling and total number of page faults for the following given page reference string. Give input n as the number of memory frames. Reference String : 12,15,12,18,6,8,11,12,19,12,6,8,12,15,19,81) Implement FIFO 2) Implement LRU. Set B. (1)Write the simulation program to implement demand...

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OS-(I) Assignment 3: CPU Scheduling Algorithms

Set A. (1)Write the program to simulate FCFS CPU-scheduling. The arrival time and first CPU- burst for different n number of processes should be input to the algorithm. Assume that the fixed IO waiting time (2 units). The next CPU-burst should be generated randomly. The output should give Gantt chart, turnaround time and waiting time for each process. Also find the average waiting time and turnaround time.. (2) Write the program to simulate...

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OS-(I) Assignment 2: Simulation of Operating System Shell and Its Working

Set A. Write a C program that behaves like a shell which displays the command prompt ‘myshell$’. It accepts the command, tokenize the command line and execute it by creating the child process.Also implement the additional command ‘count’ as  myshell$ count c filename: It will display the number of characters in given file  myshell$ count w filename: It will display the number...

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OS-(I) Assignment 1: Operations on Processes

Set A. (1) Implement the C Program to create a child process using fork(), display parent and child process id. Child process will display the message “I am Child Process” and the parent process should display “I am Parent Process”. (2) Write a program that demonstrates the use of nice() system call. After a child process is started using fork(), assign higher priority to the child using nice() system call. Set B. (1) Implement the C program...

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