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- 2019 AP® COMPUTER SCIENCE A FREE-RESPONSE QUESTIONS 2. This question involves the implementation of a fitness tracking system that is represented by the StepTracker class. A StepTracker object is created with a parameter that defines the minimum number of steps that must be taken for a day to be considered active. The StepTracker class provides a constructor and the following methods. addDailySteps, which accumulates information about steps, in readings taken once per day activeDays, which returns the number of active days averageSteps, which returns the average number of steps per day, calculated by dividing the total number of steps taken by the number of days tracked The following table contains a sample code execution sequence and the corresponding results. Statements and Expressions Value Returned Comment (blank if no value) StepTracker tr StepTracker(10000); Days with at least 10,000 steps are considered active. Assume that the parameter is positive. new tr.activeDays () ; No…problem statement: Write a java classStringCheckto do the below given checks on accepted string or strings. Each function should be coded in separate methods of the class. Give appropriate instance variables to implement the method. The user should be able to enter the string through the main function in Main class. Use a constructor to initialize the String entered by the user. Use the Main class to test all the methods in StringCheckclass. The programs should have the below given checklist: 1)Define classStringCheck with required instance variables 2)The StringCheck class should have six methods to do the below functions: *Check if the user entered string is a simple sentence? (Starts with capital letter, Ends with period, space between words). *Check if the user entered string is a question? (Check if the string starts with ac apital letter ends with a question mark, space between words) *Check if the user entered string have numbers in it? *Check if string is a valid email *Check…Use Python Programming Language Write code that defines a class named Animal: Add an attribute for the animal name. Add an eat() method for Animal that prints ``Munch munch.'' A make_noise() method for Animal that prints ``Grrr says [animal name].'' Add a constructor for the Animal class that prints ``An animal has been born.'' A class named Cat: Make Animal the parent. A make_noise() method for Cat that prints ``Meow says [animal name].'' A constructor for Cat that prints ``A cat has been born.'' Modify the constructor so it calls the parent constructor as well. A class named Dog: Make Animal the parent. A make_noise() method for Dog that prints ``Bark says [animal name].'' A constructor for Dog that prints ``A dog has been born.'' Modify the constructor so it calls the parent constructor as well. Create a test program that will: Code that creates a cat, two dogs, and an animal. Sets the name for each animal. Code that calls eat() and make_noise() for each animal. (Don't…
- 13. Fill in the blank for the toString object method of the Employee class. It returns the same thing the print method prints. public String toString() { }Please help with the following: C# .NET change the main class so that the user is the one that as to put the name Write a driver class (app) that prompts for the person’s data input, instantiates an object of class HeartRates and displays the patient’s information from that object by calling the DisplayPatientRecord, method. MAIN CLASS---------------------- static void Main(string[] args) { // instance of patient record with each of the 4 parameters taking in a value HeartRates heartRate = new HeartRates("James", "Kill", 1988, 2021); heartRate.DisplayPatientRecord(); // call the method to display The Patient Record } CLASS HeartRATES------------------- class HeartRates { //class attributes private private string _First_Name; private string _Last_Name; private int _Birth_Year; private int _Current_Year; // Constructor which receives private parameters to initialize variables public HeartRates(string First_Name, string Last_Name, int Birth_Year, int Current_Year) { _First_Name =…How many default constructors can a class have? a. A class cannot have a default constructor. b. only one c. as many as it needs d. one or more, but fewer than three
- 21. Given the following java code, the correct description of the usage of "super" is (). class Student extends Person{ public Student() { super(); } 3 D A. Used to call the super () method defined in the Person class B. Used to call the super () method defined in the Student class C. The parameterless construction method used to call the Person class D. Used to call the first constructor of the Person classSolve as C++ Code please: 1- Creates a class Student with 3 attributes: name, id and level. a. Add a constructor able to create a Student; b. Add the methods getId and getLevel; c. Add the method display able to display the attributes, 2- Creates a class StudentPhD extending the class Student with two more attributes: specialty and supervisorName; a. Add a constructor to create a StudentPhd b. Add a display method: display need to override (polymorphism) the previous display method of Student class; 3- Creates a class called College with 6 attributes: a. maxStud: a maximum number of Student into the college; b. nbStud: the current number of Student into the college. When a College is created, the number nbStud is equal to 0; c. Student Stud[]: an array of Student. The size of this array is equal to maxStud; d. maxPhdStud: a maximum number of PhDStudent into the college; e. nbPhdStud: the current number of PhDStudent into the college. When a College is created, the number nbPhDStud is…Complete the code for the following program. You are provided with an abstract class called abst. Create a class that will be a child of abst and it will be called usesAbst. Your program will have an int variable called value, and all the appropriate methods, as well 2 constructors. The first constructor will simply set the variable value to 0. The second constructor will set the variable value to equal a passed in parameter. You do not have to comment your code. public abstract class abst{ public abst () { } //Outputs to the screen the message Hello public abstract void sayHello (); //returns the stored int value public abstract int getValue (); //sets the int value to x public abstract void setValue (int x); //Outputs to the screen the message Another method public void output () { System.out.println("Another method"); public String tostring () { return "This is an abstract class"; }
- 1) Through BlueJ, the class must define a method called isSpace that allows the book club staff to determine whether there is enough capacity for a group to attend. This method must take a single integer parameter representing the size of the group, and return a boolean result. The method must work as follows: If the value of the parameter is less-than or equal-to 0 then the method must return false. This case has priority over those following. If the value of the parameter is less-than or equal-to the space left in the book club (use the capacity and occupancy values in the to work this out) then the method must return true. Otherwise (i.e., if there is not space in the book club for the whole group) then the method must return false. 2) This method must not change the state of the BookClub object. In other words, both the current number of occupants and the capacity of the club must be exactly the same after it is called as it was before (Note that the return type of this method…Computer Science write a c# program code 1) Write a class with the following features: a. Two instance variables, type string and string[] b. A default constructor that sets the string to "default" and the size of the string[] to 3 c. A one-parameter constructor with an int parameter that sets the size of the string[] to the parameter d. An instance method that displays the string variable and all values in the string[]private float c; private void method2(double y) { c = y; } in another class we created an object of the first class then within in it : tester.method2 (10.0f); are there any errors ? how many errors if there are any and with explanation please.