You has been requested to design and develop a food ordering system based on following requirements:

The system shall allow the user to place an order for the food(s), view the food details, modify or delete the details of the food if necessary. Your program should be menu driven, giving the user various choices. You shall design the system by demonstrating the full understanding of object-oriented and use of list/link-list concept.

For every food order, the following information will be stored: Order ID (Auto assigned, unique ID), Food Code, flavor (example: Strawberry, chocolate), weight (Kg), Unit Price, Qty and customer information who order this cake. The customer information consists of customer ID, name, address and contact number. The order ID shall be automatically assigned with a unique ID when new order is added. The system shall display additional information that is amount (unit price * qty) when viewing the order details.

*in C++ language .

Root is a trie that has characters for values. When traversed it spells words by formin strings.

I'm trying to make findNode such that it will return the node at which we start collecting candidates for words that start with a specific prefix.

How do I code this method traversing depth-first?

my code:

private static TreeNode<Character> findNode(TreeNode<Character> root, String prefix, int index){

Stack <TreeNode<Character>> s = new Stack<>();

s.push(root);

for(TreeNode<Character> child : root.getChildren()){
while(index <= prefix.length()-1){
if(prefix.charAt(index) == child.getValue()){
index++;
findNode(child, prefix, index);
if(prefix.charAt(index) != child.getValue()){
return child;  
}
}
}
}

}

Problem 3.

Let G be the grammar we saw in homework 3:

E -> E + T | E - T | T

T -> T * F | F

F -> ( E ) | x | y

Let w be (x + y) * x - y

a) Show the leftmost derivation for w in G. Number the rules for G and show the corresponding rule number under each substitution arrow in the derivation.

Hint: it may be easier to create a parse tree first, as you did in homework 3

b) Convert G to a string-pushing PDA, call it D_G; show a transition diagram for D_G. There will be one reduce transition for each terminal symbol in G and one shift transition for each rule in G.

Label all transitions in D_G as follows:

• T_i and T_f for the initial and final transitions

• R_c for a reduce transition that reads terminal symbol c

• S_k for a shift transition that corresponds to rule numbered k in G

c) Show an accepting computation for w in D_G as a table. This table will one row per transition, and 4 columns: remaining input, current state, stack contents, and next transition. For example, the first row in your table will be (w, q₀, e, T_i)

Hint: use your derivation from part (a) to help you choose the shift transitions

Would anyone know how to code this in SQL? I can't quite figure it out.

The following drop command is inserted for convenience so that if you need to recompile your code, it will drop the table

DROP TABLE Orders Cascade constraints

DROP TABLE OrderLine CASCADE CONSTRAINTS;

-- CREATE TABLE Orders

(

ordernum INTEGER PRIMARY KEY,

priority CHAR(10) NOT NULL,

cost INTEGER NOT NULL, /*

IC1: The priority is one of: high, medium, or low */

>>

/* IC2: The cost of a high priority order is above 2000. */

>>

/* IC3: The cost of a medium priority order is between 800 and 2200 (inclusive). */

>>

/* IC4: The cost of a low priority order is less than 1000. */

>>

Thank you in advance!

II.                Answer the following questions accordingly:

1. What is meant by the concept of management myths.

2. Explain the incremental model with respect to its features, advantages and disadvantages.

3.   Discuss the term engineering with respect to the term generic process framework.)

4.   List and explain any three (3) umbrella activity under the software framework.

1. In real-world data, tuples with missing values for some attributes are a common occurrence. Describe various methods for handling this problem.

1. What is meant by the concept of management myths.

2. Explain the incremental model with respect to its features, advantages and disadvantages.

3.   Discuss the term engineering with respect to the term generic process framework.

4.   List and explain any three (3) umbrella activity under the software framework.

1.   Assume that you are a software engineer. A client is asking you to develop a mobile application to manage the data in his mobile, with an advanced feature such as accepting voice as an input. However he still needs your help to identify other possible features. What is the most suitable process model?

2.   Mr. X wants an integrated Information System for his Car Company. He knows that the scope of the system is huge but wants it as soon as possible. He is willing to pay for the software for as long as all the subsystems are complete and delivered on time. If you are the software engineer, what process model will you use?

C++ EXERCISES

(a) Given int a = 5, b = 2, c = 4, and d = 5; determine the value of the expression:

d % b * c > 5 || c % b * d < 7.   

(b) Which repetition statement is preferred for user data input and its validation?             

(c) Write a for statement to populate an array, double val[NUMCOUNT], for the following case: Use a counter named double count that has an initial value of 16.2, a final value of 0.4, and a decrement of 0.2 and populate the val[] array with the value of count.

What is the size, NUMCOUNT, of the array val[]?

Write an if statement that uses the turtle graphics library to determine whether the turtle’s pen color is red or blue. If so, set the pen size to 5 pixels.

Python.

In most organizations, a long list of “to-do” projects for development exists. Since each organization only has limited staff and financial resources to accomplish the long list of IT project it is important to know how to identify, classify and select which projects will be undertaken.

Describe what occurs during project identification, classification and selection. Why can this process be challenging at times?

IN JAVA

Lab 10

This program reads times of runners in a race from a file and puts them into an array. It then displays how many people ran the race, it lists all of the times, and if finds the average time and the fastest time.

In BlueJ create a project called Lab10

• Create a class called Main
• Delete what is in the class you created and copy the Main class below into the file.
• There are 7 parts of the program that you will have to code. They are labeled Part A through Part G in the comments in the code.
• The comments for each part will describe the code you are to write.
• Using notepad, create the two data files given below and save them in the project folder on the hard drive
• There is also output given below.
• When finished, submit main to Zybooks

Text File: times1.txt

12.4321 23.543 10.23 16.342 21.12

Text File: times2.txt

14.473 17.5 21.178 11.8 9.874 18.71 19.801 14.310 20.7 12.78 9.915 11.789

main method to be used for lab

import java.util.Scanner;
import java.io.File;
import java.io.FileNotFoundException;
public class Main
{
    public static void main(String [] args)
    {
//DO NOT CHANGE MAIN
       double average;
       double fastest;
       double [] times;
       times = new double[50];
       int numRacers;
       numRacers = fillArray(times);
       System.out.println("\nThere were " + numRacers + " people in the race ");
// Hint: You may want to comment out the following lines of code until you 
// get the method fillArray to work (use the debugger to check if it is 
// working. Then uncomment the next method call you are implementing and 
// get that to work. Do one method at a time.
       System.out.println("\nThe times were: ");
       printTimes(times, numRacers);

       average = findAverage(times, numRacers);
       System.out.printf("The average time was: %.2f%n", average);

       fastest = findFastest(times, numRacers);
       System.out.printf("The fast time was: %.2f%n", fastest);

    }

    public static int fillArray(double [] array)
    {
        int numElems = 0;
        Scanner keyboard = new Scanner(System.in);
        String fileName;
        System.out.print("Enter the file name: ");
        fileName = keyboard.next();
        // Part A
        // Declare a input file Scanner and link it to the filename the user
        // typed in. Make sure the file opens correctly and if it doesn't print
        // and error message to the screen and exit the program.




        // Part B
        // Code the loop that will read in the numbers from the file and put them 
        // into the array. The integer numElems should keep track of how many numbers
        // are being placed into the array




        // Part C
        // Close the file


        // Part D
        // return the number of elements in the array

    }

    public static void printTimes(double [] array, int numElems)
    {
        // Part E
        // Write the loop to print the array to the screen as shown




    }

    public static double findAverage(double [] numbers, int numE)
    {
        // Part F
        // Write the code required to calculate the average of all of the
        // numbers in the array The method should return the average. If 
        // there are no elements in the array it should return a -1




    }

    // Part G
    // Write the method to find the fastest time in the array. The method 
    // should return the fastest time. If there are no times in the array
    // the method should return a -1






}

Sample Output 1

Enter the file name: times1.txt

There were 5 people in the race 

The times were: 
          12.43
          23.54
          10.23
          16.34
          21.12
The average time was: 16.73
The fast time was: 10.23

Sample Output 2

Enter the file name: times2.txt

There were 12 people in the race 

The times were: 
          14.47
          17.50
          21.18
          11.80
           9.87
          18.71
          19.80
          14.31
          20.70
          12.78
           9.92
          11.79
The average time was: 15.24
The fast time was: 9.87

Write code:

using R to combine two pictures into one picture and save it. For example put imagin1.png into image2.png and save it as imagin3.png.

Create a basic functioning Deep Belief Network coding using C++ or MATLAB.

Express the binary strings in the left column of the following table in hexadecimal notation in the right column of the table.

Add the bit strings in the first two columns of the following table and report the answer in the last column in binary notation.