Q#6: Create a class for invoice item having attributes invoice id (it'll be unique for every invoice item), item description (name of product and details), quantity (number of items), and price (sail price). There is behavior to set all values. There is a display method that will show invoice id, item description, quantity, price of single item and total amount of the invoice item. Create objects to show following details. ID Name Quantity Price Total Amount 1 Chips 50 mg small pack 12 10 120 2 Chocolate Biscuit small pack 15 75 5

Q#6: Create a class for invoice item having attributes invoice id (it'll be unique for every invoice item), item description (name of product and details), quantity (number of items), and price (sail price). There is behavior to set all values. There is a display method that will show invoice id, item description, quantity, price of single item and total amount of the invoice item. Create objects to show following details. ID Name Quantity Price Total Amount 1 Chips 50 mg small pack 12 10 120 2 Chocolate Biscuit small pack 15 75 5

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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1. Create a class Employee with parameters name, id, designation, and basicSalary. Use appropriate datatypes and access specifiers. Use default constructor to create objects of employee. Write methods toset and get the values of parameters of employee. Write methods to find total salary of employee andto display the complete details of employee along with total salary. Create another class TestEmployeewhich creates array of n number of employees, uses appropriate set methods to set the values ofparameters of every employee. Display the details of each employee. (Total salary = basic salary + 80%of basic salary)
TODO 2 Complete the TODO by finding the locations of the data samples for each iris flower type. Hint: Use the code for how we found all the setosa_locs as an example! Using iris_df, find the location of all the data sample locations for the versicolor class which has a label of 1. To do so, use NumPy's np.where() function. Using iris_df, find the location of all the data sample locations for the virginica class which has a label of 2. To do so, use NumPy's np.where() function. setosa_locs = np.where(iris_df['class'] == 0)[0] # TODO 2.1versicolor_locs = # TODO 2.2virginica_locs = todo_check([ (type(versicolor_locs) is np.ndarray, "'versicolor_locs' is not type np.ndarray. Make sure you indexed np.where() currently!"), (type(virginica_locs) is np.ndarray, "'virginica_locs' is not type np.ndarray. Make sure you indexed np.where() currently!"), (versicolor_locs[0] == 50, "'versicolor_locs' has an incorrect value"), (virginica_locs[0] == 100, "'virginica_locs' has an…
Question: 2Implement the design of the Chillox and Customer classes so that the following code generates the output below:print(f"It's been a good day!. \nToday, we have already served {Chillox.order_id} customers.")print("**************************************************")outlet1 = Chillox()print("1.==========================================")print("Burger Menu:")print(Chillox.menu)print("2.==========================================")outlet1.addBurger("Chicken Burger",180,"Chicken with Cheese",200)print("3.==========================================")print("Burger Menu:")print(Chillox.menu)print("4.==========================================")c1 = Customer("Samin")c1.order = "2xChicken Burger"outlet1.placeOrderof(c1)print("5.==========================================")outlet1.addBurger('Chicken Smoky BBQ Cheese',225)c2 = Customer("Rafi")c2.setOrder("2xChicken with Cheese,3xChicken Smoky BBQ…
Please, I want to modify the code so that the user can add the employee's name, number and specialization, and use for loob He must add more than one employee. When he finishes adding the employee’s data, he asks the user: Do you want 1-Print the data 2-Add a new employee 3-Exit class Doctor:"""Represents a Doctor""" #initializer with specialization default to "general"def __init__(self, Id, name, specialization="general"):#attributesself.Id = Idself.name = nameself.specialization = specialization.lower() #initializing salary to 25000, basic salaryself.salary = 25000 #incrementing salary based on specialization#if specialization is pediatric, increasing salary by 10%if specialization == "pediatric":self.salary += self.salary*10/100 #if specialization is dental, increasing salary by 15%elif specialization == "dental":self.salary += self.salary*15/100 #str() functiondef __str__(self):return (f"Id: {self.Id} \n"f"Name: {self.name} \n"f"Specialization: {self.specialization} \n"f"Salary:…
this is the whole problem i did 1 to 3 im stuck at 4 Create a class called Student, with the following attributes/variables:a. studentName (String)b. studentNumber (int)sc. regYear(long)d. faculty(String)e. department(String)2. Add the following methods in Student:a. accessors and mutators for all variablesb. toString methodi. Formulate your toString so that it only shows studentName,studentNumber and faculty3. Create a class called MyFriends, with the following attributes variables:a. studentArray(Student[])4. Add the following methods in MyFriends:a. fillArrayi. Using scanner ask how many students does the user want to inputii. Capture user input for all of his friends(Of course we are assuming all your friends would be similarUWC students, go ask around and meet new friends, alsopreferably not in the same Computer Science department … ifpossible … only if possible)b. maini. Call the fillArray methodii. Count how many Computer Science studentsiii. If half or more students are…
(Java) Question 5,6 ANSWER BOTH PART 1 AND 2!!! Explain the answer step-by-step and include verbal explanation. Thank you! Given the below Car class, update the default constructor so that it calls the two argument constructor. public class Car { private String make;private String model;public Car() {make = "Make unknown";model = "Model unknown";}public Car(String make, String model) {this.make = make;this.model = model;} public String getMake() {return make;}public String getModel() {return model;}public void setMake(String make) {this.make = make;}public void setModel(String model) {this.model = model;}public boolean timeForService(int currMileage) {if (currMileage < 10000) {return true;}return false;}@Override public String toString() {return "Make: " + make + "\nModel: " + model;}} PART 2 Next, override the equals() method for the above Car class using the formula provided in class.
Question: 2 Implement the design of the Purchaser and AarongProducts classes so that the following code generates the output below: #Write your code here p1 = Purchaser('Alex Light') print('1.===============================') print(p1) product1 = AarongProducts('Decor', 'Photo-Frame') print('2.===============================') print(product1) print('3.===============================') print(AarongProducts.products) print('4.===============================') AarongProducts.include_products('Souvenirs',['Brass-Flowervase 2170', 'Terracotta-Vase 3500']) print(f'Updated Item List:\n{AarongProducts.products}') print('5.===============================') product2 = AarongProducts('Souvenirs', 'Terracotta-Vase', 2) print(product2) print('6.===============================') p1.create_invoice(product1, product2) print('7.===============================') product3 = AarongProducts('Decor', 'Candles', 5) print(product3) print('8.===============================') product4 =…
Consider the following class Certification with following data members Id (int), name (String) , hours(int), level (String), costPerHr (double). You are required to do the following  Provide a class StudentCertification that extends Certification . This class has an additional data member rebate (double) o Override the calculateFee method so that the total cost is calculated by getting the total for the training hours @costPerHr and applying the rebate (%). E.g. if the costPerHr is 200 and 50 hours training and 0.2 rebate then the calculateFee should return 10000 – 0.2 *10000 = 8000  Provide another sub class ProfessionalCertification that extends Certification. This class no additional data member. o It overrides the calculateFee method so that the total cost is returned as the product of hours and cost per hour plus 15% tax of the total hours cost. Also the ProfessionalCertification implements the Extendible Interface. You will also have to provide the implementation of method…
Write a SelfPayKiosk class to support basic operations such as scan item, cancel transaction, checkout, and make payment. SelfPayKiosk.java is provided with method stubs. . Step 0. Declare private fields for number of customers served (int), total sales (double), and current amount due (double). Note the provided final variable for sales tax of 7%. Step 1 . Complete the constructor to initialize all private fields to zero. Complete the accessor methods to return the number of customers served, total sales, and current amount due. Step 2 . Complete the scanItem() method. Increase the amount due by parameter price. Do not update amount due if parameter price is negative. Step 3. Complete the checkOut() method. Multiply amount due by SALES_TAX and add to amount due. Step 4. Complete the makePayment() method. If parameter payment is enough to pay the amount due, increase total sales by amount due, increment number of customers served, and reset amount due to zero in preparation for…
Question: 2 Implement the design of the Laptop and Store classes so that the following code generates the output below: print("Total Laptop Created:",Laptop.total_laptop) print("1.=========================================") s1 = Store() p1 = Laptop("Lenovo B4180", 55000) print("2.=========================================") p2 = Laptop("HP Pavilion") print("3.=========================================") s1.add_laptop(p1, p2) print("4.=========================================") p2.setPrice(77000) s1.add_laptop(p2) print("5.=========================================") s1.sell_laptop("HP Probook") print("6.=========================================") print(s1) print("7.=========================================") s2 = Store("Star Tech") p3 = Laptop("HP Probook", 58000) print("8.=========================================") p4 = Laptop("Lenovo Thinkpad", 60000) print("9.=========================================") p5 = Laptop("HP Elite", 80000)…
Consider this scenario, a mehtod in some class needs to access a data field in another class, here are two possible implementations: public class Process { /* * Check if student qualifies for financial help */ void check(Student student) { //.... } /* * Check if student qualifies for financial help */ void check(double studentGPA) { //.... }} In class Process, which check method you think is better, why? In other words, should we pass the object to the method or just the data member it needs? Disucuss the Pros and Cons of each approach (if any). Assume class Student has a mehod called getGPA( ).
Question 6 Encapsulation is achieved by combining which of the following into a class?