Question

need help with this assignment, please.

Part 1 - Java program named MemoryCalculator 

     In your Ubuntu VM (virtual machine), using terminal mode ONLY, do the following:

     Create the folder program2

     In this folder place the text file located on my faculty website in Module 2 called RAMerrors (Do not rename this file, it has no extension.) It is down below.

Ths is the file RAMErrors

3CDAEFFAD

ABCDEFABC

7A0EDF301

1A00D0000

     Each record in this file represents the location of an error found in RAM. (Hint: One of them is not on one of the chips.)

     Assume you have a computer with 4 gigs of RAM, each gig in a 

     different memory chip, therefore, you have 4 one gig RAM chips.

                                         ---------decimal---------------   

     HINT: RAM chip 0 contain addresses:              0 -  8,589,934,584 bits

           RAM chip 1 contain addresses:  8,589,934,585 - 17,179,869,184 bits

           RAM chip 2 contain addresses: 17,179,869,185 - 25,769,803,768 bits

           RAM chip 3 contain addresses: 25,769,803,769 - 34,359,738,368 bits

     HINT: RAM chip 0 contain addresses:             0 -  1,073,741,823 bytes

           RAM chip 1 contain addresses: 1,073,741,824 -  2,147,483,648 bytes 

           RAM chip 2 contain addresses: 2,147,483,647 -  3,221,225,471 bytes 

           RAM chip 3 contain addresses: 3,221,225,472 -  4,294,967,296 bytes 

     In the same folder, in terminal mode using an editor, create a Java program 

     to do the following:

     - Call the Java program - MemoryCalculator.java

     - Open the RAMerrors text file  

     - Read each record

     - Print the RAM memory chip where the error is located for each record

     *** CREATE YOUR OWN METHODS THAT WILL CONVERT 

           HEX TO BINARY AND BINARY TO DECIMAL

     *** DO NOT USE JAVA'S AUTOMATIC CONVERSION METHODS 

 Part 2 - Linux Shell Scripting. 

   - NOT using editors, create a sh file named: program2.sh

- Set the permissions for this this *.sh file using this command to make it executable: chmod 755 *.sh

- program2.sh should append your name and the current date and time to a NEW file called results.txt

-program2.sh should then do the following:

How:

- Ask the user to enter a number.

- Verify that the number is between 1 and 50, inclusive.

- If the number is not between 1 and 50, then keep asking the user to enter a number until it is

valid.

- Use a loop from 1 to the value entered by the user

- Sum the results of all the included numbers, but do not include any output yet.

- After the loop ends, display the sum and

append it to the results.txt file on a new line as follows Sum of numbers is xxx

Zip your files into one file named FirstnameLastnameA2.zip submit them in the Assignment 2 dropbox.

Only include the folowing files: - MemoryCalculator.java

- program2.sh Zip your files into one file named FirstnameLastnameA2.zip submit them in the Assignment 2 dropbox. 

   Only include the folowing files:

   - MemoryCalculator.java

   - program2.sh

Answer 1

Problem 1: MemoryCalculator.java

RAMErrors

Execution :

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

Problem 2 : program2.sh

Execution ::

RAW CODE :::

______________________________________ MemoryCalculator.java ______________________________________

import java.io.*;
class MemoryCalculator {
   static String hex2bin(String hex) {
       String bin = "";
       for(int i=0; i<hex.length(); i++){
           char chr = hex.charAt(i);
           switch(chr){
               case '0' : bin += "0000";break;
               case '1' : bin += "0001";break;
               case '2' : bin += "0010";break;
               case '3' : bin += "0011";break;
               case '4' : bin += "0100";break;
               case '5' : bin += "0101";break;
               case '6' : bin += "0110";break;
               case '7' : bin += "0111";break;
               case '8' : bin += "1000";break;
               case '9' : bin += "1001";break;
               case 'A' : bin += "1010";break;
               case 'B' : bin += "1011";break;
               case 'C' : bin += "1100";break;
               case 'D' : bin += "1101";break;
               case 'E' : bin += "1110";break;
               case 'F' : bin += "1111";break;
           }
       }
       return bin;
   }
   static long bin2decimal(String bin){
       int len,i,j;
       long value = 0,powvalue; // for long integers
       len = bin.length();
       for(i=0; i<len; i++){
           if (bin.charAt(i) == '1'){ // If 1 is there in bit
               powvalue = 1; // For pow(2,(len-i-1))
               for(j=0;j<(len-i-1);j++) powvalue *= 2;
               value = value + powvalue; // Then add that correspond power of 2 to value
               // System.out.println(powvalue);
           }
       }
       return value;
   }
   public static void main(String args[]){
       long value; String hex;
       try{
           FileInputStream fstream = new FileInputStream("RAMErrors");
           DataInputStream in = new DataInputStream(fstream);
           BufferedReader br = new BufferedReader(new InputStreamReader(in));
           String strLine;
           //Read File Line By Line
           while ((strLine = br.readLine()) != null) {
               hex = hex2bin(strLine); // Coverting the line to hex
               value= bin2decimal(hex); // Hex to decimal
               // Then Cheking that decimal with conditions of bits
               if( value <= 8589934584L) System.out.println("RAM chip 1");
               else if ( value <= 17179869184L ) System.out.println("RAM chip 2");
               else if ( value <= 25769803768L ) System.out.println("RAM chip 3");
               else if ( value <= 34359738368L ) System.out.println("RAM chip 4");
               else System.out.println("RAM chip : out of value"); // Out of conditions
           }
           in.close();
       }catch (Exception e){//Catch exception if any
           System.err.println("Error: " + e.getMessage());
       }
   }
}

##################################################################################################

____________________________________________ RAMErrors ___________________________________________

3CDAEFFAD
ABCDEFABC
7A0EDF301
1A00D0000
#################################################################################################

__________________________________________ program2.sh ___________________________________________

#!/bin/bash

read -p 'Enter a number: ' N
Sum=0
if [ $N -ge 1 ]
then
   if [ $N -le 50 ]
   then
       for i in $(seq 1 $N) # for loop from 1 to N
           do # Then Adding those value to Sum
               Sum=$[$Sum+$i]
           done # Writing the Sum to result.txt
       echo "Sum of numbers is $Sum" > results.txt
   else
       echo "The number must be <= 50"
   fi
else
   echo "The number must be >= 1"
fi

###################################################################################################