A- Briefly explain what is the purpose of the SW operation in S-DES i.e. How would S-DES be weakened if the SW operation was ommitted.

B- Briefly explain why in DES the key is 56-bits instead of 64-bits?

(PYTHON)

A Prime number is an integer greater than 1 that cannot be formed by multiplying two smaller integer other than 1 and itself. For example, 5 is prime because the only ways of writing it as a product, 1 × 5 or 5 × 1.

In this question you will write a program that takes a sequence of integers from the user and display all the prime numbers contained in that sequence.

We will separate this question in 2 steps:

Step 1 (5 pts) Write a script that accepts a sequence of positive integer from the user and display all the prime numbers from that sequence. Your program should accept and save in a list the input from the user until the value -1 is entered. Your program should also make sure that only positive values are entered. You can assume the users only enter integers.

Step 2 (5 pts) We can improve the program usability by adding the following functions:

- A function is_prime that receives an integer as parameter, check if this integer is a prime number and returns a boolean value depending on the result. -

A function find_primes that receives the user sequence as parameter and use the function is_prime to figure out which are the prime values. The function then returns a list containing all the prime values contained in the user sequence.

Your user input script should be similar as in part 1 and use the result of the find_primes function to display the list of prime numbers.

You have been appointed as a design engineer and assigned to design a secured network
for a private organization. Evaluate your approach to improve the security posture of
your network before, during, and after your network implementation.

several trends and issues that are specifically relevant to the field of instructional design and technology.

Goal:

After the manager of a local McDonalds hired several ASU grads to work the cash registers, he realized that they were having trouble figuring out the correct amount of change to return to their customers. The manager wants you to create a VB.NET program that calculates the correct amount of change to be given to a customer following a transaction.

Guidelines:

You should have

• Option Explicit On (this forces you to declare all of your variables)
• Option Strict On (this forces you to explicitly convert from one data type to another rather than relying on VB.Net to make these conversions for you implicitly)

• At least one relevant image on your form (lots of McDonalds and $$ images available on the Net)
• Calculate, Clear, and Exit buttons along the bottom of your form

Inputs:

  Transaction Amount

  validation: data must have been entered, data must be numeric, amount cannot be negative or greater than $1000.00

Amount of Cash Provided By The Customer

validation: data must have been entered, data must be numeric,

amount cannot be negative and must be equal to or greater than the Transaction Amount

Outputs:

Total Amount of Change To Be Returned

Number of Twenties To Be Returned

Number of Tens To Be Returned

Number of Fives To Be Returned

Number of Ones To Be Returned

Number of Quarters To Be Returned

Number of Dimes To Be Returned

Number of Nickels To Be Returned

Number of Pennies To Be Returned

Guidelines

Look up one of the many sites describing the BMI, and read a bit about how it is used to indicate general health. Create a VB.Net program that, given a user’s height in inches and weight in pounds, will calculate and display his/her BMI. After calculating the user's BMI, indicate the user's health status.  

BMI = (weight * 703) / (height * height)

Display the user’s Height Status:

Input: Height and Weight.

Output: BMI (to one decimal, like 27.7) and Weight Status (a string, like “Overweight”)

After the remarks at the top of your program, add “Option Explicit On” and “Option Strict On”. The former requires you to explicitly declare each variable used and the latter requires you to explicitly convert data from one type to another, rather than rely on VB.Net to implicitly convert data.    

describe how prime numbers or quadratic congruence can be used to crack an encryption system?

Does anyone know how to find if a certain String is available in an ArrayList?

I was asked by my instructor to make a certain program about Student Record

In the area where I need to add some student in the ArrayList it won't add if there is the same name in the ArrayList

at first I used the equals method and contains method but later I found it was prohibited to use such method.

Is there a way to find if a String is Available in the ArrayList without using the method

Please check on else if(response==2)

import java.util.*;
public class performanceTask {

   public static void main(String[] args) {
       int response;
       ArrayList<String> listOfStudent = new ArrayList<String>();

       Scanner aScanner = new Scanner(System.in);
       do {
           System.out.println("[Selection Bar]");
           System.out.println("[1] List of Students.");
           System.out.println("[2] Add Student.");
           System.out.println("[3] Edit Student.");
           System.out.println("[4] Delete Student.");
           System.out.println("[5] Clear list of Students.");
           System.out.println("[6] Exit Program.");
           System.out.println("--------------------------");
           System.out.println("Select an option: ");
           response = aScanner.nextInt();
          
           if(response == 1) {
               int size = listOfStudent.size();
               if(size == 0) {
                   System.out.println("No Records Found!\n");
               } else {
                   Collections.sort(listOfStudent);
                   for(int i = 0; i<listOfStudent.size(); i++) {
                       System.out.println(i + ". " + "[" + listOfStudent.get(i) + "]");
                      
                   }
                   System.out.println("\n");
              
               }
           }else if (response == 2) {
               System.out.println("Enter Name of a Student: ");
               String addStudent = aScanner.next();
              
               if (listOfStudent.contains(addStudent)) {
                   System.out.println(addStudent +" already existed! \n");
                  
               } else {
                   System.out.println("Do you want to save " + addStudent + "? [y/n]: ");
                   String saveIt = aScanner.next();
                       if(saveIt.equals("y") || saveIt.equals("Y") ) {
                           listOfStudent.add(addStudent);
                           System.out.println(addStudent +" has been successfully added! \n ");
                       }else if (saveIt.equals("n") || saveIt.equals("n")) {
                           System.out.println("\n");
                           continue;
                       }else {
                           System.out.println("It must be y or n only!");
                       }
                   }
              

1) Convert negative fractional decimal number to 8-bit binary number: – 16.625 (use 2's complement binary format)

Hint: –17 + 0.375

Given the hint above, the fractional number will be divided into two parts,
- Whole number,
- Fractional part, must be positive

(2) Proof to check that your calculation above is correct

Spatial indexing with quadtrees in python

The quadtrees data structure is a special type of tree structure, which can recursively divide a flat 2-D space into four quadrants. Each hierarchical node in this tree structure has either zero or four children. It can be used for various purposes like sparse data storage, image processing, and spatial indexing. Spatial indexing is all about the efficient execution of select geometric queries, forming an essential part of geo-spatial application design. For example, ridesharing applications like Ola and Uber process geo-queries to track the location of cabs and provide updates to users. Facebook’s Nearby Friends feature also has similar functionality. Here, the associated meta-data is stored in the form of tables, and a spatial index is created separately with the object coordinates. The problem objective is to find the nearest point to a given one. You can pursue quadtree data structure projects in a wide range of fields, from mapping, urban planning, and transportation planning to disaster management and mitigation. We have provided a brief outline to fuel your problem-solving and analytical skills. Objective: Creating a data structure that enables the following operations

 Insert a location or geometric space

 Search for the coordinates of a specific location

 Count the number of locations in the data structure in a particular contiguous area

SYSTEM RECOVERY

It is highly probable that eventually something bad will happen to your data or your hardware. What can you do to lessen the impact of these problems? You can look at both hardware and software solutions. What is fault tolerance?

In C++

1. Extend the driver class to do the following:
   1. Declare a vector of circles
   2. Call a function with signature inputData(vector<Circle> &, string filename) that reads data from a file called dataLab4.txt into the vector. The following c-e are done in this function
   3. Use istringstream to create an input string stream called instream. Initialize it with each string that is read from the data file using the getline method.
   4. Read the coordinates for the center and the radius from instream to create the circles
   5. Include a try catch statement to take care of the exception that would occur if there was a file open error. Display the message “File Open Error” and exit if the exception occurs
   6. Display all the circles in this vector using the toString method
   7. Use an iterator to iterate through the vector to display these circles
   8. Display the count of all the circles in the vector using the getCount method
   1. Display the count of all the circles in the vector using the vector size method
   10. Clear the vector
   11. Display the current count of all the circles using the getCount method
   50. Display the current count of all the circles using the vector size method
   1000. Use the cout statements and other helper statements given to you in the template in Zylabs

Create "Circle.h"

Create "Circle.cpp"

Complete Main.cpp

#include<iostream>
#include "Circle.h"
#include <fstream>
#include <vector>
#include<cstdlib>

#include <fstream>
#include <sstream>
void inputData(vector<Circle> &circleVector, string filename){
//create the input string stream called instream

//open file
//if there is a problem opening the file, throw an exception and exit - use a try catch statement
//otherwise
//use getline to read data line feed to the instream
//create a circle using the data in the instream
//add the circles to the vector
//keep doing this until all the data in the file is read

}

int main(){


cout<<"The number of circles, using getCount method is "<<//<<endl;
cout<<"The numher of circles, using vetor size method is "<<//<<endl;
//clear vector
cout<<"The number of circles, using getCount method is "<<//<endl;
cout<<"The number of circles remaining is ";

return 0;
}

file "dataLab4.txt" contains:

0 0 4
0 0 6
-2 -9 6
4 5 7
7 8 9

I'm trying to convert between different number representations in C++ , I have the prototype but im not sure what do do from here

bool convertF(double & x, const string & bits);

bits is supposed to be an 8-bit (not 5-bit) value, each char being '0' or '1'; if not, return

false. The first bit of bits represents the sign bit, the next 3 bits represent the exponent,

and the next 4 bits represent the significand.

convertF may assume without checking that the 3 exponent bits are not all the same.

convertF's job is to set x to the floating-point number that bits represents and return

true.

For example, convertF(x, "101011000") should set x to -7/8 == -0.875

# ArrayStack
# TODO: 
push and pop using array stack with doubling technique.

import numpy as np
from future import print_function

# Definisi class ArrayStack
class ArrayStack(object):
        def __init__(self):
                self.data = np.zeros(20, dtype=np.int)
                self.count = 0
                
        def isEmpty(self):
                pass # ubah saya
                
        def size(self):
                pass # ubah saya
                
        def push(self, obj):
                pass # ubah saya
                
        def pop(self):
                pass # ubah saya
                
#--------------------------
# End of class

if __name__ == "__main__":
        stack = ArrayStack()
        randn = np.random.permutation(1000)
        for i in range(1000):
                stack.push(randn[i])
        ####
        for i in range(100):
                print(stack.pop())
        ####