c) This question requires you to write the code for a Java servlet called RespondServlet. This servlet will receive a POST request with the URL parameters: name="Oliver Twist"&type="student"&year="3" When accessed, the servlet should reply with an unformatted document (i.e., in plain text): that has the value of the three parameters contained in the document, such that they will be printed in the browser screen; that displays the message "Some data is missing!" if the value of either the name or type parameters is missing, to ensure your servlet code is robust (i.e., it can cope with invalid inputs). Note: Your answer must only make use of programming concepts that were covered in the module.

Develop a Visual C# .NET solution that provides a login authentication service. This solution will have a class library component and two application components contained within the same solution. The LoginAuthenticator Class Create a class library project named LibLoginAuthenticator that contains a class named LoginAuthenticator. The LoginAuthenticator class must support the following features: •The class defines a public string read/write property named Username which gets/sets the Username for the authenticator. • The class defines a public string property named Password which sets the Password for the authenticator. The get part should be private. •The constructor for the class should set the initial values of Username and Password to null. • The class defines a public method named Authenticate with no parameters which returns a bool? (nullable bool) value. • If either Username or Password is null, the method should return null to indicate that not all fields were provided. • If…

This program is in C++ language. Making a program called Last Student Standing. Create a class named "YourLN" The class contains: Two int data fields named age and idNum specifying the age and id number of the student. One string data field named firstName containing the student's first name.  A no-arg constructor that creates a student with an age of 1, idNum of -1, and firstName of "blank". A constructor that creates a student with the specified age, idNum, and firstName. The accessories and mutator functions for all the data fields.  A function named nameID() that returns a string containing both the name and idNum separate by a '-'.  Write a program that asks the user to specify the number of students. For each student, ask the user for the age, id number, and first name of the student and put that student object into an array. Once all the students have been entered, step thru the array and set every third student's name to "blank". As you step thru the array back to the front,…

fast in pyth please

Written in Python with docstring please if applicable Thank you

As the first step in writing an application for the local book store, we will design and implement a Book class that will define the data structure of the application. Each book has a name, author, type (paperback, hardback, magazine), integer ID and pageCount. Provide some data validation in the appropriate method to ensure that the ID and pageCount are not negative. Design and implement a Book class with separation, i.e., separate all functions and methods into both the prototype and an implementation below the main.  Provide constructor methods for Book(void), Book(name, author), and one for all components Book(name, author, type, ID, pageCount) Provide accessor (get and set) methods for each property as well as a display method. Provide data validation for the ID and pageCount in the appropriate methods. Provide a method to calculate the cost for buying books (with a 7.75% sales tax) according to the following chart:     Hardcover:        $29.95 per book    Paperback:…

// Declare data fields: a String named customerName, // an int named numItems, and // a double named totalCost.// Your code here... // Implement the default contructor.// Set the value of customerName to "no name"// and use zero for the other data fields.// Your code here... // Implement the overloaded constructor that// passes new values to all data fields.// Your code here... // Implement method getTotalCost to return the totalCost.// Your code here... // Implement method buyItem.//// Adds itemCost to the total cost and increments// (adds 1 to) the number of items in the cart.//// Parameter: a double itemCost indicating the cost of the item.public void buyItem(double itemCost){// Your code here... }// Implement method applyCoupon.//// Apply a coupon to the total cost of the cart.// - Normal coupon: the unit discount is subtracted ONCE// from the total cost.// - Bonus coupon: the unit discount is subtracted TWICE// from the total cost.// - HOWEVER, a bonus coupon only applies if the…

In this lab, you create a derived class from a base class, and then use the derived class in a C++ program. The program should create two Motorcycle objects, and then set the Motorcycle’s speed, accelerate the Motorcycle object, and check its sidecar status. Instructions Ensure the file named Motorcycle.cpp is open in your editor. Create the Motorcycle class by deriving it from the Vehicle class. Use a public derivation. In the Motorcycle class, create a private attribute named sidecar. The sidecar attribute should be data type bool. Write a public set method to set the value for sidecar. Write a public get method to retrieve the value of sidecar. Write a public accelerate() method. This method overrides the accelerate() method inherited from the Vehicle class. Change the message in the accelerate() method so the following is displayed when the Motorcycle tries to accelerate beyond its maximum speed: "This motorcycle cannot go that fast". Open the file named…

For the Point2D data type, create three static comparators: one that compares points based on their x, y, and distance from the centre, and the other two that compare points based on their respective coordinates. For the Point2D data type, create two non-static comparators: one that compares objects based on how far they are from a given point, and the other that compares objects based on how far they are from a given point polarly.

C++YOU ONLY NEED TO EDIT date.h, dateOFYear.h, and dateOFYear.cpp date.h | date.cpp | dateOfYear.h | dateOfYear.cpp | dateTest.cpp You have been provided a Date class. Each date contains day and month parameters, a default and a custom constructor, mutator and accessor functions for the parameters, and input and output functions called within operator >> and <<. You will be writing a DateOfYear class, which expands on the Date class by adding a year parameter. This will be achieved via inheritance – DateOfYear is the derived class of the Date base class. In DateOfYear, will need to write… The include guards for the class A default constructor that initializes all parameters to 1 A custom constructor that takes in a month, day, and year to initialize the parameters Mutator and accessor for the year parameter Redefined versions of inputDate and outputDate that takes into account the new year parameter. The driver program, dateTest.cpp, is already set for use with both Date…