Which of the following class definition is correct in Java? a. ONLY (i) b. ONLY (ii) c. BOTH (i) and (ii) d. None of these.
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Which of the following class definition is correct in Java?
a. ONLY (i)
b. ONLY (ii)
c. BOTH (i) and (ii)
d. None of these.
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- class first { public: void setX(); void print() const; protected: int y; void setY(int a); private: int x; }; Suppose that class second is derived from class first using the statement: class second: private first which members of class first are private, protected, and public in class second?A(n) ____________ is one instance or variable of a class.Quadratic equations The form of a quadratic equation is ax2 + bx + c = 0. Write a program that solves a quadratic equation in all cases, including when both roots are complex numbers. Remember that the solutions are x = (-b + sqrt(b2 -4ac))/2a and (-b - sqrt(b2 -4ac))/2a For this you will need to set up the following classes: Complex: Encapsulates a complex number. ComplexPair: Encapsulates a pair of complex numbers. Quadratic: Encapsulates a quadratic equation. – Assume the coefficients are all of type int for this example. SolveEquation: Contains the main method. (I give this to you it is shown below) Along with the usual constructors, accessors and mutators you will need the following additional methods: In the Complex class a method called isReal to determine whether a complex object is real or not returning a boolean value. In the ComplexPair class a method bothIdentical that determines if both complex numbers are identical, returning a boolean value. In the…
- Build a class named car. This class is defined as follows: It has the fields: Car ID, Car model , Car make, Car color, Car year. Build a constructor that accepts the five parameters (Car ID, Car model , Car make,Car color, Car year). Override the method toString() to return the string representation of Car ID, Carmodel , Car make, Car color, Car year.Given the following class public class student { private String name; private String email; private int id; } Write two possible overloaded constructors for the class studentTrue or False It is legal to write a class without any constructors.
- True or FalseThe same rules for naming variables apply to naming classes.T/F A method defined in a class can access the class' instance data without needing to pass them as parameters or declare them as local variables.Java Questions - (Has 2 Parts). Based on each code, which answer out of the choices "A,B,C,D,E" is correct. Each question has one correct answer. Thank you. Part 1 - 3. Given the following code, the output is __. class Base { private int x = 5; }class Derived extends Base { x = 6; }public class Sample { public static void main(String[] args) { int x = 7; Derived d1 = new Derived(); System.out.print(d1.x); }} A. 0B. 5C. 6D. 7E. Error message Part 2 - 4. A class Animal has a subclass Mammal. Which of the following is true? A. class Animal extends Mammal { }B. class Mammal extends Animal { }C. class Animal implements Mammal { }D. class Mammal implements Animal { }E. class Mammal { Animal a1 = new Animal(); }
- Programming Language = Python 1. Employee and ProductionWorker Classes Write an Employee class that keeps data attributes for the following pieces of information: • Employee name • Employee number Next, write a class named ProductionWorker that is a subclass of the Employee class. The ProductionWorker class should keep data attributes for the following information: • Shift number (an integer, such as 1, 2, or 3) • Hourly pay rate The workday is divided into two shifts: day and night. The shift attribute will hold an integer value representing the shift that the employee works. The day shift is shift 1 and the night shift is shift 2. Write the appropriate accessor and mutator methods for each class. Once you have written the classes, write a program that creates an object of the ProductionWorker class and prompts the user to enter data for each of the object’s data attributes. Store the data in the object and then use the object’s accessor methods to retrieve it and display it on the…:Define and implement class Employee. This class should contain the following fields: first name, last name, employee id, hourly pay. This class should contain getters and setters for all its attributes. This class also needs at least one constructor. Implement method computePay() in this class. This method should accept an integer number of hours the employee worked as an input argument and return a floating point value indicating the pay the employee earned. If the number of hours is invalid (e.g. a negative number) this method should throw NumberFormatException. If the number of hours is over 40 then this method should throw a custom exception named TooManyHoursWorkedException. Remember that you will have to define your own exception class for this. Save this class and its definition into a file named Employee.java. Define and implement class EmployeeTest.This class should implement main() method. In the body of the main() method you should create an instance of Employee with the…class first { public: void setX(); void print() const; protected: int y; void setY(int a); private: int x; }; Suppose that class second is derived from class first using the statement: class second: private first Determine which members of class first are private, protected, and public in class second.