Question

CSC1465L: Operating Systems Lab Consider the threads hierarchy below: T2 T1 T3 T1 will ask the user to enter an array of size N and will fill the array with student grades. T1 will then send the array to threads T2 and T3. T2 will compute the maximum grade of passed students. T3 will compute the maximum grade of failed students. T1 will print the maximum and minimum grades returned by threads T2 and 13. Note: A student passes an exam if his/her grade is greater than or equal to 60. T1 is the main thread. The solution must be submitted as 3 java files.

Answer 1

I have implemented the three java files required to implement the required task. Please find the Code screenshot, Output, and Code.

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1.CODE SCREENSHOT:

2.OUTPUT:

CS. C:\Windows\System32\cmd.exe D:\javasrc\ThreadMinMax>javac MaxOfPassed.java D:\javasrc\ThreadMinMax>javac MaxOfFailed.java D:\javasrc\ThreadMinMax>javac TaskThreadDemo.java D:\javasrc\ThreadMinMax>java TaskThreadDemo Enter the value for 'n' : 10 Enter 10 Integers for Grades45 65 85 95 65 35 25 15 45 75 The Maximum Grade of Passed Students is :95 The Maximum Grade of Failed Students is :45 D:\javasrc\ThreadMinMax>,

3.CODE:

MaxOfPassed.java

class MaxOfPassed implements Runnable {    //To Store the Array    private int arr[];    public MaxOfPassed(int []a) {        arr=a;    }    @Override       public void run() {        int max=0;        //find the max element in the array        for (int i = 0; i < arr.length; i++) {            if(max<arr[i])                max=arr[i];        }        if(max>=60)            System.out.println("The Maximum Grade of Passed Students is :"+max);        else            System.out.println("Sorry No Student has Passed");    } }

MaxOfFailed.java

class MaxOfFailed implements Runnable {    private int arr[]; //to store the array    public MaxOfFailed(int []a) {        arr=a;    }    @Override    public void run() {        int max=0;        find the max element in the array who have falied        for (int i = 0; i < arr.length; i++) {            if(max<arr[i]&&arr[i]<60)                max=arr[i];        }        System.out.println("The Maximum Grade of Failed Students is :"+max);           } }

TaskThreadDemo.java

import java.util.*; public class TaskThreadDemo{    public static void main(String[] args)throws Exception{        Scanner sc=new Scanner(System.in);        //read the value of n        System.out.print("Enter the value for 'n' : ");        int n=sc.nextInt();        int arr[]=new int[n];        //read the array        System.out.print("Enter "+n+" Integers for Grades");        for(int i=0;i<n;i++){            arr[i]=sc.nextInt();        }               //1.Code to Create threads associated with the given tasks        Runnable m1=new MaxOfPassed(arr);        Runnable m2=new MaxOfFailed(arr);        //2.Code that will initiate the threads and cause the begining of execution.        Thread t1=new Thread(m1);        Thread t2=new Thread(m2);        //start the threads        t1.start();        //t1.join();        t2.start();        //t2.join();    } }