1. Typing ps alone lists the current running processes. lab3.c can be compiled as, gee -o lab3 lab3.c. The output of the program can be obtained by typing: ./lab3. Below are the examples of the possible outputs that would be generated by the ps and ./lab3 commands: /lab3 PID TTY TIME CMD Process ID is: 13126 pts/0 pts/0 13043 00:00:00 bash Parent Process ID is 13125 13133 00:00:00 ps Process ID is: 13125 Parent Process ID is 13124 Process ID is: 13127 Parent Process ID is 13124 Process ID is: 13124 Parent Process ID is 13043 Please remember that PID value of bash (Unix command shell) is 13043 for this example. So the process tree can be drown by using the above information as: 13125 13120 PARENT CHILD 1 CHILD 2 13043 13124 BASH 13127 CHILD 3 Write the output of your program and draw a process three and label the processes with their process IDs. Output Process Tree Process ID is: Parent Process ID is Process ID is: PARENT Parent Process ID is CHÍLD 1 CHILD 2 Process ID is: Parent Process ID is CHILD 3 Process ID is: Parent Process ID is

1. Typing ps alone lists the current running processes. lab3.c can be compiled as, gee -o lab3 lab3.c. The output of the program can be obtained by typing: ./lab3. Below are the examples of the possible outputs that would be generated by the ps and ./lab3 commands: /lab3 PID TTY TIME CMD Process ID is: 13126 pts/0 pts/0 13043 00:00:00 bash Parent Process ID is 13125 13133 00:00:00 ps Process ID is: 13125 Parent Process ID is 13124 Process ID is: 13127 Parent Process ID is 13124 Process ID is: 13124 Parent Process ID is 13043 Please remember that PID value of bash (Unix command shell) is 13043 for this example. So the process tree can be drown by using the above information as: 13125 13120 PARENT CHILD 1 CHILD 2 13043 13124 BASH 13127 CHILD 3 Write the output of your program and draw a process three and label the processes with their process IDs. Output Process Tree Process ID is: Parent Process ID is Process ID is: PARENT Parent Process ID is CHÍLD 1 CHILD 2 Process ID is: Parent Process ID is CHILD 3 Process ID is: Parent Process ID is

Name: 1. Typing ps alone lists the current running processes. lab3.c can be
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Description: 1. Typing ps alone lists the current running processes. lab3.c can be compiled as, gee -olab3 lab3.c. The output of the program can be obtained by typing: ./lab3. Below arethe examples of the possible outputs that would be generated by the ps and ./

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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provive the linux c output screenshot for the code below: #include<stdio.h> int main(){ int n, at[10], bt[10], wt[10], ct[10], p[100], t=0, temp, small,k; float att=0.0, awt=0.0 ; printf("enter no.of processes: "); scanf("%d",&n); for(int i=0;i<n;i++){ printf("enter arrival time of process %d:\t",i); scanf("%d",&bt[i]); wt[i]=0; t+=bt[i]; } for(int i=0;i<n;i++){ for(int j=i+1;j<n;j++){ if(at[i]>at[j]){ temp=at[i]; at[i]=at[j]; at[j]=temp; temp=bt[i]; bt[i]=bt[j]; bt[j]=temp; } } } for(int i=0;i<t;i++){ small=25000; for(int j=0;j<n;j++) { if((bt[j] != 0) && (at[j]<=i) && (bt[j]<small)) { small=bt[j]; k=j; } } bt[k]--; p[i]=k; } k=0; for(int i=0;i<total;i++){ for(j=0;j<n;j++) { if(p[i]==j) { ct[j]=i; wt[j]++; } } } for(int i=0;i<n;i++){ printf("\n process %d:-finish time==> %d turnaround time==>%d waiting time==>%d\n", i+1,ct[i]+1,(ct[i]-at[i])+1, (((ct[i]+1)-wt[i])-at[i]));…
You are required to write a C program on Unix/Linux in which the parent process creates three child processes, lets them run concurrently, and waits for them to return and prints their exit status. The three child processes are assigned different tasks. Child one is to calculate and display the average mark of a class of twenty students for a unit. Child one is required to get the marks from the standard input (i.e. the keyboard). Child two is to load a program called “wc” (word count) to count file1. Child two is required to get file1 by the command line argument. Child three is to modify file2 by first inserting “this is the updated version.” at the beginning of this file and then replacing all the occurrences of the word “run” by “execute” and “examine” by “study”. You are required to write your OWN program for the file update. Child three is required to get file2 by the command line argument.
Modiflow y the beprogram given to include response time program;FCFS CPU SCHEDULING ALGORITHM #include<stdio.h>#include<conio.h>main(){int bt[20], wt[20], tat[20], i, n; float wtavg, tatavg;clrscr();printf("\nEnter the number of processes -- "); scanf("%d", &n); for(i=0;i<n;i++){printf("\nEnter Burst Time for Process %d -- ", i); scanf("%d", &bt[i]);}wt[0] = wtavg = 0; tat[0] = tatavg = bt[0]; for(i=1;i<n;i++){wt[i] = wt[i-1] +bt[i-1];tat[i] = tat[i-1] +bt[i]; wtavg = wtavg + wt[i]; tatavg = tatavg + tat[i];}printf("\t PROCESS \tBURST TIME \t WAITING TIME\t TURNAROUND TIME\n");for(i=0;i<n;i++){printf("\n\t P%d \t\t %d \t\t %d \t\t %d", i, bt[i], wt[i], tat[i]);}printf("\nAverage Waiting Time -- %f", wtavg/n);printf("\nAverage Turnaround Time -- %f", tatavg/n); getch();}
Write a c program called file1.c Program file1.c uses these: (a) fork() to launch another process. (b) exec() to replace the program driving this process, while supplying arguments to file2.c to complete its execution. (c) wait() to complete the execution of the child process. (d) file1.c takes two arguments x( a number less than 1) and n (number of terms to be added, 1 or more). For example: file1 0.5 5 (e) When the child process finishes, the parent prints: Parent(PID=yyy) : Done
You are tasked with the development of an E-Scooter ride-sharesystem. It allows registered commuters to approach an idle E-Scooter andreserve it, following which they use the E-Scooter to commute a certaindistance (that is not known prior to use). Finally, after the commuter reachestheir destination, they end the ride, which prompts an automaticcomputation of the ride fees. which is automatically debited using thecommuters registered payment details.
Use C, C++, python or matlab to develop a program whose main routine accepts two parameters n and k, i.e. when you invoke your program from the shell, you pass it two parameters, n and k, where n >=16 and k >=8and is in powers of 2 (e.g. 8, 16, 32, etc.). Your main routine shall generate a random page trace of length n, where the page numbers have values ranging from 0 to ? − 1. Develop a subroutine within your program that implements the FIFO page replacement algorithm (as a separate function within your program). The function shall accept a page trace and a parameter f for the number of frames allocated. Your main routine shall then apply the random page trace to the subroutine implementing the page replacement algorithm, multiple times (using only one trace, randomly generated), passing a parameter f (number of page frames used) that ranges from 4 to k. Your main routine shall then record the number of page faults for each run (i.e. for each f).Run your program using a page…
The following program consists of 3 concurrent processes and 3 binary semaphores. The semaphores are initialized as S0 =1, S1= 0, S2=0 Process P0 Process P1 Process P2 wait(S0); print '0' release(S1) release (S2);} wait(S1); release(S0); wait(S2); release(S0); How many times will process P0 print ‘0’?
Write a program that consists in three processes to print the message “ping-pong” two times on screen. The main process creates two processes Ping and Pong (Ping can only print “ping” and Pong can only print “pong”), then wait for them to finish. Use the following pipes to synchronize Ping and Pong Hint: - To make a process waits, let him read from an empty pipe - The main process is not allowed to print on screen.
The following program consists of 3 concurrent processes and 3 binary semaphores. The semaphores are initialized as S0 = 0,S1 = 1 and S2 = 1. Process P0:while (true) { wait (S0); print '1';release(S1);release(S2);} Process P1:wait (S2);release (S0); Process P2:wait(S2);release(S0); How many times will process P0 print '1'?
Write an MPI program to calculate the communication time between two processes. Given an array of random integers, Write MPI_Send and MPI_Recv to send an entire array back and forth between process 0 and process 1 (two processes) for 1000 times. After one process receives the array, it sends this array back to the other process. The array is bounced back and forth between the two processes like a ping-pong ball for 1000 times. Use MPI_Wtime() to record the total time for arrays of 1 million integers, 2 million integers, 4 million integers, and 8 million integers.
Create a game using the LPC1768 and MBED Application Board running MBED OS 5 or 6. The game must use at least two periodic (time-driven) tasks and one event-driven task, its complexity should be manageable by the given hardware. All tasks must have a visible output. At least two of the tasks must share an output which they could (in theory) access simultaneously so that mutual exclusion must be used to avoid a race condition in your code. The game should include some form of timing
Write a device driver for a character device which implements a simple way of message passing. The kernel maintains a list of messages. To limit memory usage, we impose a limit of 4KB = 4*1024 bytes for each message and also impose a limit of the total number of messages stored in the kernel, which is 1000. Your device driver should perform the following operations: * When the module is loaded, the device is created. An empty list of messages is created as well. * Removing the module deallocates all messages, removes the list of messages and removes the device. * Reading from the device returns one message, and removes this message from the kernel list. If the list of messages is empty, the reader returns -EAGAIN. * Writing to the device stores the message in kernel space and adds it to the list if the message is below the maximum size, and the limit of the number of all messages stored in the kernel wouldn't be surpassed with this message. If the message is too big, -EINVAL is…