Consider two sets of integers, X = [x1, x2, . . . , xn] and Y = [y1, y2, . . . , yn]. Write two versions of a FindUncommon(X, Y ) algorithm to find the uncommon elements in both sets.
Each of your algorithms should return an array with the uncommon elements, or an empty array if there are no uncommon elements.
You do not have to write the ‘standard’ algorithms – just use them. Therefore, you should be able to write each algorithm in about 10 lines of code. You must include appropriate
comments in your pseudocode.

(a) Write a pre-sorting based algorithm of FindUncommon(X, Y ). Your algorithm should strictly run in O(n log n).

(b) Write a Hashing based algorithm of FindUncommon(X, Y ). Your algorithm should run in O(n).

Topic 2 TRUE OR FALSE Q’s

31.          A natural number is the number 0 or any number obtained by adding 1 to a natural number.

32.          The category of numbers called integers includes negative numbers.

33.          A rational number is any number that can be expressed without a fractional part.

34.          The base of a number system determines the number of digits used in the system.

35.          The digits used in any base are 1 through the base number.

36.          The base of the hexadecimal number system is 15.

37.          A number in any base can be expressed using a positional notation.

38.          The letter C is used to represent the number 11 in hexadecimal.

39.          The number 10 represents the base value in every number system.

40.          Representing a number in base 5 sometimes requires more digits than representing that same number in base 10.

41.          The value of each position in a number system is determined by subtracting the base from the position number.

42.          A byte is made up of eight binary digits.

43.          Two hexadecimal digits can be stored in one byte.

44.          Starting from the right, every group of four binary digits can be read as one hexadecimal digit.

45.          To find the decimal equivalent in a new base you just divide the decimal value by the new base.

Java

Define a class called BlogEntry that could be used to store an entry for a Web log.

The class should have instance variables to store :

- the poster’s username,

- text of the entry,

- and the date of the entry using the Date class

Date class is:

class Date

{

private int day, year;

private String mon;

public Date()

{

mon=" ";

day=0;

year=0;

}

public String toString()

{

return (mon+"/"+day+"/"+year);

}

public set_date(String m, int d, int y)

{

mon=m;

day=d;

year=y;

}

}

Methods:

-Add a constructor that allows the user of the class to set all instance variables.

-Also add a method, DisplayEntry()/toString(), that outputs all of the instance variables,

- method called getSummary that returns the first 10 characters from the text (or the entire text if it is less than 10 characters).

.

.

.

.

.

.

my code so far:

import java.util.Scanner;

public class BlogEntry
{
   private String name;
   private String entry;

   public BlogEntry(String n, String e, String m, int d, int y)
   {
       System.out.println("Poster's name: "+n+"\nEntry Text: "+e);
       System.out.println("Date: "+m+" "+d+", "+y);
   }
   public String getName()
   {
       return name;
   }
   public void setName(String n)
   {
       this.name=n;
   }
   public String getEntry()
   {
       return entry;
   }
   public void setEntry(String e)
   {
       this.entry=e;
   }
   class date
   {
   private int d, y;
   private String m;
   public date(String m,int d, int y)
   {
       m= " ";
       d=0;
       y=0;
   }
   public void setdate(String m, int d, int y)
   {
       m=m;
       d=d;
       y=y;
   }
   }
private void String setSummary()
   {
   String summary=" ";
   int space=0;
   int script=0;
   while(space<=9 && script<entry.length())
   {
       String next=entry.substring(script,script+1);
       if(next.equals(" "))
       {
           if(space<=9)
               space++;
           else
               break;
       }
       summary+=next;
       script++;
   }
   return summary;
   }
   public getSummary()
   {
       return summary;
   }

public static void main(String [] args)
{
String name;
String entry;
String month;
int day;
int year;

Scanner input=new Scanner(System.in);

System.out.println("Please enter the Poster's name: ");
name=input.nextLine();

System.out.println("What is the text for the blog entry: ");
entry=input.nextLine();

System.out.println("What is the date of the entry?");
System.out.println("Please enter the month: ");
month=input.nextLine();
System.out.println("Please enter the day: ");
day=input.nextInt();
System.out.println("Please enter the year: ");
year=input.nextInt();

System.out.println("\nBlog Entry:");
BlogEntry entry1= new BlogEntry(name,entry,month,day,year);
BlogEntry entry2= new BlogEntry(name,entry,month,day,year);
entry2.setSummary(entry);
System.out.println("\nThe summary of this entry is "+entry2.getSummary);
  
  
  
  
}

}

.

.

.

.

the error is occuring for my getSummary and setSummary

BlogEntry.java:47: error: '(' expected private void String setSummary() ^

BlogEntry.java:67: error: invalid method declaration; return type required public getSummary() ^

2 errors

Please construct a code following the instructions below

Part 3 – infixEvaluator method

You are required to implement the following method:  

public static double infixEvaluator(String line)

This function first needs to tokenize the input expression (in the form of a String and stored in input variable “line”). You can tokenize the input expression by creating an object of StringSplitter and passing it the String as follows. StringSplitter uses a queue to accomplish the tokenization (see the class for details).

StringSplitter data = new StringSplitter(line);

Next, create your two stacks. Remember one will contain the operators and the other one will include the operands. Define them as follows:

Stack<String> operators = new Stack<String>();  

Stack<Double> operands = new Stack<Double>();

Before we continue further in this method, it will be helpful to consider helper methods we might need (which will make our job easier :-).

Skeleton of the code below:

/**

* give a description of the purpose of this method

* @param line fill in

* @return fill in

*/

public static double infixEvaluator(String line){

return 0.0; // placeholder

}

Problem: Write a program that takes your weight in pounds as input and then prints how much you will weigh on Moon and Mars. The formula to convert weight on the Earth to weight on Moon and Mars are given below:

• Weight on Moon = weight on Earth * 0.165
• Weight on Mars = weight on Earth * 3.711 / 9.81

You should name the program as weight_watcher.py. The output should look like as shown below:

Lab # 4 Multidimensional Arrays

Please write in JAVA.

Programming Exercise 8.5 (Algebra: add two matrices)

Write a method to add two matrices. The header of the method is as follows:

public static double[][] addMatrix(double[][] a, double[][] b

In order to be added, the two matrices must have the same dimensions and the same or compatible types of elements. Let c be the resulting matrix. Each element cij is aij + bij. For example, for two 3 * 3 matrices a and b, c is

Write a test program that prompts the user to enter two 3 * 3 matrices and displays their sum. Here is a sample run

Example run:

Enter matrix1: 1 2 3 4 5 6 7 8 9 (enter)

Enter martix2: 0 2 4 1 4.5 2.2 1.1 4.3 5.2 (enter)

The matrices are added as follows:

1.0 2.0 3.0              0.0 2.0 4.0            1.0 4.0 7.0

4.0 5.0 6.0        +    1.0 4.5 2.2     =      5.0 9.5 8.2

7.0 8.0 9.0              1.1 4.3 5.2           8.1 12.3 14.2

Programming Exercise 8.6 (Algebra: multiply two matrices)

Write a method to multiply two matrices. The header of the method is:

public static double[][] multiplyMatrix(double[][] a, double[][] b)

To multiply matrix a by matrix b, the number of columns in a must be the same as the number of rows in b, and the two matrices must have elements of the same or compatible types. Let c be the result of the multiplication. Assume the column size of matrix a is n. Each element cij is ai1 * b1j + ai2 * b2j + c + ain * bnj. For example, for two 3 * 3 matrices a and b, c is

where cij = ai1 * b1j + ai2 * b2j + ai3 * b3j. Write a test program that prompts the user to enter two 3 * 3 matrices and displays their product. Here is a sample run:

Example run:

Enter matrix1: 1 2 3 4 5 6 7 8 9 (enter)

Enter matrix2: 0 2 4 1 4.5 2.2 1.1 4.3 5.2 (enter)

The multiplication of the matrices is

1 2 3           0 2.0 4.0               5.3 23.9 24

4 5 6     *     1 4.5 2.2     =       11.6 56.3 58.2

7 8 9           1.1 4.3 5.2            17.9 88.7 92.4

discuss the local and global impact of computing on individuals, organizations, and society

Answer the following questions about Starvation.

1. Explain what it means for a job to experience Starvation.
2. How is starvation similar to or different from Deadlock or Livelock?
3. What can an operating system do to prevent a starving job from "remaining in the system forever"?

public class GroceryShopping
{
   //declared variable
   private String vegetableName;
   private String fruitName;
   private double vegetablePrice;
   private double fruitPrice;
   private double vegetableOrdered;
   private double fruitOrdered;
  
   //declared constants
   public static final double SERVICE_RATE =0.035;
   public static final double DELIVERY_FEE=5;
  
   public GroceryShopping( String vegetableName, String fruitName, double vegetablePrice, double fruitPrice)
   {
       this.vegetableName = vegetableName;
       this.fruitName = fruitName;
       this.vegetablePrice = vegetablePrice;
       this.fruitPrice = fruitPrice;
       this.vegetableOrdered = vegetableOrdered;
       this.fruitOrdered=fruitOrdered;
   }
   public String getVegetableName()
   {
       return vegetableName;
   }
  
   public void setVegetableName(String vegetableName)
   {
       this.vegetableName = vegetableName;
   }
  
   public String getFruitName()
   {
       return fruitName;
   }
  
   public void setFruitName(String fruitName)
   {
       this.fruitName = fruitName;
   }
  
   public double getVegetablePrice()
   {
       return vegetablePrice;
   }
  
   public void setVegetablePrice(double vegetablePrice)
   {
       this.vegetablePrice = vegetablePrice;
   }
  
   public double getFruitPrice()
   {
       return fruitPrice;
   }
  
   public void setFruitPrice(double fruitPrice)
   {
       this.fruitPrice = fruitPrice;
   }
  
   public double getVegetableOrdered()
   {
       return vegetableOrdered;
   }
  
   public void setVegetableOrdered(double vegetableOrdered)
   {
       this.vegetableOrdered = vegetableOrdered;
   }
  
   public double getFruitOrdered()
   {
       return fruitOrdered;
   }
  
   public void setFruitOrdered(double fruitOrdered)
   {
       this.fruitOrdered = fruitOrdered;
   }
  
  
   public double calculateSubtotal()
   {
       double calculateSubtotal=(vegetablePrice*vegetableOrdered)+(fruitPrice*fruitOrdered);
       return calculateSubtotal;
   }
  
   public double calculateAdditionalFee()
   {
       double calculateAdditionalFee=calculateSubtotal()* SERVICE_RATE + DELIVERY_FEE;
       return calculateAdditionalFee;
   }
  
   public void displayOrderSummary()
   {
       double totalBill=calculateSubtotal()+calculateAdditionalFee();
       System.out.println("--------------------------------------");
       System.out.println("Grocery Shopping Order Summary");
       System.out.println("\nName"+"\t\t\tPrice Per Pound");
       System.out.println("Sub-total:"+"\t\t$"+calculateSubtotal());
       System.out.println("Additional Fee:"+"\t\t$"+calculateAdditionalFee());
       System.out.println("Total Bill:"+"\t\t$"+totalBill);
       System.out.println("--------------------------------------");
      
   }
  
  
  
  
  
  
  
  
  
}

public class GroceryShoppingApp
{

  
   /**
   * @param args
   */
   public static void main(String[] args)
   {
       Scanner input=new Scanner(System.in);
      
  
       displayTable1();
       System.out.println("\nPlease select the vegetable from Table 1: ");
       String vegetableName=input.next();
       System.out.println("please enter the price of the selected vegetable: ");
       double vegetablePrice=input.nextDouble();
      
       displayTable2();
       System.out.println("\nPlease select the fruit from Table 2");
       String fruitName =input.next();
       System.out.println("Please enter the price of the selected fruit:");
       double fruitPrice =input.nextDouble();
       GroceryShopping gs =new GroceryShopping(vegetableName, fruitName, vegetablePrice, fruitPrice);
      
      
      
       System.out.println("\n--------------------------------------");
       System.out.println("Grocery Shopping Menu");
       System.out.println("\nName"+"\t\tPrice Per Pound");
       System.out.println(gs.getVegetableName()+"\t"+gs.getVegetablePrice());
       System.out.println(gs.getFruitName()+"\t\t"+gs.getFruitPrice());
       System.out.println("--------------------------------------\n");
       System.out.println("\nEnter the pounds of "+ gs.getVegetableName()+" ordered: ");
       double vegetableOrdered=input.nextDouble();
       System.out.println("Enter the pounds of "+ gs.getFruitName()+" ordered: ");
       double fruitOrdered=input.nextDouble();      
  
       System.out.println("\n\n\n--------------------------------------");
       System.out.println("Grocery Shopping Order Summary");
       System.out.println("\nName"+"\t\tPrice Per Pound");
       System.out.println(vegetableName+"\t"+vegetablePrice);
       System.out.println(fruitName+"\t\t"+fruitPrice);
      
       gs.displayOrderSummary();
      
       input.close();
      

   }

   private static void displayTable1()
   {
   System.out.println("Vegetable Name\t\t"+"Price Per Pound");
   System.out.println("Broccoli\t\t"+"$3.12");
   System.out.println("Yellow Onion\t\t"+"$1.15");
   System.out.println("Chill Pepper\t\t"+"$4.58");
   System.out.println("Greens Bundle\t\t"+"$2.82");
   System.out.println("--------------------------------------");
   System.out.println("Table 1: Vegetable names with corresponding price per pound");
   }
  
  
   private static void displayTable2()
   {
   System.out.println("\n--------------------------------------");
   System.out.println("Fruit Name\t\t"+"Price Per Pound");
   System.out.println("Apple\t\t\t"+"$1.73");
   System.out.println("Grape\t\t\t"+"$2.15");
   System.out.println("Key Lime\t\t"+"$2.58");
   System.out.println("Navel Orange\t\t"+"$1.86");
   System.out.println("--------------------------------------");
   System.out.println("Table 2: Fruit names with corresponding price per pound ");
   }
  
}
I have two question

1) My Sub-Total fee is always is zero, no matter what i input.

2)When i input the vegetable and fruit name, only the apple , Grape and Broccoli are working. The others always shows error, when i try to input them.

I want to create an Android mobile application, an application that provides courses for students ... I want advice for safety and security, what are its requirements ... and what are the yooze case for this application and the Functional requirements of your opinion

MATLAB language;

...

Boyle's law of gases says that:

P1V1 = P2V2

Make a program (script) that calculates any of the 4 parameters, based on the elements that the user decides, that is:

P1 = P2V2 / V1 - ask for the data that is needed. P2, V2, V1

V1 = P2V2 / P1 - ask for the data that is needed. P2, V2, P1

P2 = P1V1 / V2 - ask for the data that is needed. P1, V2, V1

V2 = P1V1 / P2 - ask for the data that is needed. P1, P2, V1

REMEMBER THAT FROM THAT ELECTION, THE REQUIRED VALUES ARE ASKED

11. What is the output of the following program? Slightly modify the program so that: [Pts. 10]
    1. The Parent process calculates the val such a way that its value is 20 and it prints “This is parent process and val = 20”. Also, slightly modify
    2. The child process calculates the val such a way that its value is 25 and it prints “This is child process and val = 25”.

int main() {

int val = 15;

int pid;

if (pid = fork()){

wait(pid);

printf(“This is parent process and val = “);

}

else{

printf(“This is child process and val = “);

val++;

}

printf("%d\n", val);

return val;

}

//2.--------------------------------------------------------------
Given an array of size N, what is the complexity?
int m = A[0];
for (int i=1; i<N; i++)
{ if (A[i] > m) m = A[i]; }
int k = 0;
for (int i=0; i<N; i++)
{ if (A[i] == m) k++; }

What is a (name one) most frequent operation performed?______________________

Expression showing the number of times it is performed ___________

Time Complexity in Big-O Notation O( ) _____________________________________________________

//3.--------------------------------------------------------------
int mult(int N, int M)
{
   int s = 0;
   while (N > 0)
   {
       s = s + M;
       N = N-1;
   }
   return s;
}

What is a (name one) most frequent operation performed?______________________

Expression showing the number of times it is performed___________

Time Complexity in Big-O Notation O( )

Managing Linux Servers (Apache, Samba, DNS,

1. What is the Apache directive that specifies the base directory for configuration and log files?

2. Once you’ve modified httpd.conf, what command would make Apache reread this file, without kicking off currently connected users?

3. What directive specifies the TCP/IP port associated with Apache?

4. What ports must be open for a Samba server to work with remote systems?

6. What samba configuration steps are required for mapping a Windows user to a Linux user?

7. From a nfs server, how would you allow readonly access to /opt for any system in example.com?

8. How would you instruct a DNS server to respond only to queries from the 137.44.* IP range?

9. What is pNFS ?

10. What do you understand by "nfsstat --nfs --server -3" command?

11. How to retrieve a list of clients connected to the NFS server ?

14. What is a difference between Apache and Nginx web server?

15. Explain Bind chroot environment ?

20. Can Samba be a member of more than one workgroup at the same time?