Program: File name: “ Die.java ” //Define a class named Die public class Die { //Declare the private variables and initialize the value private int value; private static final int HIGHEST_DIE_VALUE = 6; private static final int LOWEST_DIE_VALUE = 1; //Define a Die method public Die() { //Calculate the value value = ((int)(Math.random() * 100) % HIGHEST_DIE_VALUE + LOWEST_DIE_VALUE); } //Define a getValue method public int getValue() { //Return the value return value; } } File name: “ FiveDice2.java ” //Define a class named FiveDice2 public class FiveDice2 { //Define a main method public static void main(String[] args) { //Declare a variable and initialize the value final int NUM = 5; //Store the five dice rolled value for computer Die[] comp = new Die[NUM]; //Store the five dice rolled value for player Die[] player = new Die[NUM]; //Declare a variable int x; //For loop to be executed until x exceeds NUM for(x = 0; x < NUM; ++x) { //Allocating memory for the array objects comp[x] = new Die(); player[x] = new Die(); } //Declare the variables int compMatch, playerMatch; //Get computer name String computerName = "Computer"; //Get player name String playerName = "You"; //Display the message display(computerName, comp, NUM); display(playerName, player, NUM); //Calls the method to find same numbers for computer compMatch = howManySame(comp, NUM); //Calls the method to find same numbers for player playerMatch = howManySame(player, NUM); //If computer has one of a kind if(compMatch == 1) //Print the result System.out.println("Computer has nothing"); //Else computer has a pair, three, four, or five of a //kind else //Print the result System.out.println("Computer has " + compMatch + " of a kind"); //If player has one of a kind if(playerMatch == 1) //Print the result System.out.println("You have nothing"); //Else player has a pair, three, four, or five of a kind else //Print the result System.out.println("You have " + playerMatch + " of a kind"); //If any higher combination of computer beats a lower //one of player if(compMatch > playerMatch) //Print the result System...

Question

Create 6 users: Don, Liz, Shamir, Jose, Kate, and Sal. Create 2 groups: marketing and research. Add Shamir, Jose, and Kate to the marketing group. Add Don, Liz, and Sal to the research group. Create a shared directory for each group. Create two files to put into each directory: spreadsheetJanuary.txt meetingNotes.txt Assign access permissions to the directories: Groups should have Read+Write access Leave owner permissions as they are “Everyone else” should not have any access Submit for grade: Screenshot of /etc/passwd contents showing your new users Screenshot of /etc/group contents showing new groups with their members Screenshot of shared directories you created with files and permissions

Answer 1

Expert Solution & Answer

Chapter 8, Problem 2GZ

a.

Explanation of Solution

Program:

File name: “Die.java”

//Define a class named Die

public class Die

{

    //Declare the private variables and initialize the value

    private int value;

    private static final int HIGHEST_DIE_VALUE = 6;

    private static final int LOWEST_DIE_VALUE = 1;

    //Define a Die method

    public Die()

    {

        //Calculate the value

        value = ((int)(Math.random() * 100) % HIGHEST_DIE_VALUE +

         LOWEST_DIE_VALUE);

    }

    //Define a getValue method

    public int getValue()

    {

        //Return the value

        return value;

    }

}

File name: “FiveDice2.java”

//Define a class named FiveDice2

public class FiveDice2

{

    //Define a main method

    public static void main(String[] args)

    {

        //Declare a variable and initialize the value

        final int NUM = 5;

        //Store the five dice rolled value for computer

        Die[] comp = new Die[NUM];

        //Store the five dice rolled value for player

        Die[] player = new Die[NUM];

        //Declare a variable

        int x;

        //For loop to be executed until x exceeds NUM

        for(x = 0; x < NUM; ++x)

        {

            //Allocating memory for the array objects

            comp[x] = new Die();

            player[x] = new Die();

        }

        //Declare the variables

        int compMatch, playerMatch;

        //Get computer name

        String computerName = "Computer";

        //Get player name

        String playerName = "You";

        //Display the message

        display(computerName, comp, NUM);

        display(playerName, player, NUM);

        //Calls the method to find same numbers for computer

        compMatch = howManySame(comp, NUM);

        //Calls the method to find same numbers for player

        playerMatch = howManySame(player, NUM);

        //If computer has one of a kind

        if(compMatch == 1)

            //Print the result

            System.out.println("Computer has nothing");

//Else computer has a pair, three, four, or five of a //kind

        else

            //Print the result

System.out.println("Computer has " + compMatch + " of a kind");

        //If player has one of a kind

        if(playerMatch == 1)

            //Print the result

            System.out.println("You have nothing");

        //Else player has a pair, three, four, or five of a kind

        else

            //Print the result

System.out.println("You have " + playerMatch + " of a kind");

        //If any higher combination of computer beats a lower //one of player

        if(compMatch > playerMatch)

            //Print the result

            System...

b.

Explanation of Solution

Program:

File name: “Die.java”

//Define a class named Die

public class Die

{

    //Declare the private variables and initialize the value

    private int value;

    private static final int HIGHEST_DIE_VALUE = 6;

    private static final int LOWEST_DIE_VALUE = 1;

    //Define a Die method

    public Die()

    {

        //Calculate the value

        value = ((int)(Math.random() * 100) % HIGHEST_DIE_VALUE +

         LOWEST_DIE_VALUE);

    }

    //Define a getValue method

    public int getValue()

    {

        //Return the value

        return value;

    }

}

File name: “FiveDice3.java”

//Define a class named FiveDice3

public class FiveDice3

{

    //Define a main method

    public static void main(String[] args)

    {

        //Declare a variable and initialize the value

        final int NUM = 5;

        //Store the five dice rolled value for computer

        Die[] comp = new Die[NUM];

        //Store the five dice rolled value for player

        Die[] player = new Die[NUM];

        //Declare a variable

        int x;

        //For loop to be executed until x exceeds NUM

        for(x = 0; x < NUM; ++x)

        {

            //Allocating memory for the array objects

            comp[x] = new Die();

            player[x] = new Die();

        }

        //Declare the variables

        int compMatch, playerMatch;

        int compHigh, playerHigh;

        //Get computer name

        String computerName = "Computer";

        //Get player name

        String playerName = "You";

        //Display the message

        display(computerName, comp, NUM);

        display(playerName, player, NUM);

        //Calls the method to find same numbers for computer

        compMatch = howManySame(comp, NUM);

        //Calls the method to find same numbers for player

        playerMatch = howManySame(player, NUM);

        //Compute the value

        compHigh = compMatch / 10;

        playerHigh = playerMatch / 10;

        compMatch = compMatch % 10;

        playerMatch = playerMatch % 10;

        //If computer has one of a kind

        if(compMatch == 1)

            //Print the result

            System.out.println("Computer has nothing");

//Else computer has a pair, three, four, or five of a //kind

        else

            //Print the result

System.out.println("Computer has " + compMatch + " of a kind");

        //If player has one of a kind

        if(playerMatch == 1)

            //Print the result

            System.out.println("You have nothing");

        //Else player has a pair, three, four, or five of a kind

        else

            //Print the result

            System.out.println("You have " + playerMatch + " of a kind");

//If any higher combination of computer beats a lower one of player

        if(compMatch > playerMatch)

            //Print the result

            System.out.println("Computer wins");

        //Else

        else

        //If any higher combination of player beats

        //a lower one of computer

        if(compMatch < playerMatch)

        //Print the result

        System.out.println("You win");

        //Else

        else

        {

//If values of computer are greater than player's value

            if(compHigh > playerHigh)

                //Print the result

System...

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Create 6 users: Don, Liz, Shamir, Jose, Kate, and Sal. Create 2 groups: marketing and research. Add Shamir, Jose, and Kate to the marketing group. Add Don, Liz, and Sal to the research group. Create a shared directory for each group. Create two files to put into each directory: spreadsheetJanuary.txt meetingNotes.txt Assign access permissions to the directories: Groups should have Read+Write access Leave owner permissions as they are “Everyone else” should not have any access Submit for grade: Screenshot of /etc/passwd contents showing your new users Screenshot of /etc/group contents showing new groups with their members Screenshot of shared directories you created with files and permissions

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