MysteryClass-first: int-second: double;+MysteryClass ()+MysteryClass (int)+MysteryClass (double);+MysteryClass (int, double)+setData (int, double): void+getFirst (): int+getSecond(): double+doubleFirst (): int+squareSecond () : double+print (): void+equals (MysteryClass): boolean+makeCopy (MysteryClass): void+getCopy (): MysteryClass46. Which of the following would be a default constructor for the class MysteryClass shown in the figureabove?public MysteryClass () { setData (0, 0.0); )b. public MysteryClass (0, 0.0) { set Data (); }public MysteryClass (0)( setData (0, 0.0); }d private MysteryClass (10) { setData (); }a,C.47. Which of the following is used to allocate memory for the instance variables of an object of a class?a. the reserved word publicb. the reserved word staticc. the operator newd. the operator + 48. Consider the following class definition.public class Rectangle{private double length;private double width;public Rectangle ()length = 0;width = 0;public Rectangle (double 1, double w){length = l;width = w;public void set (double 1, double w){length = 1;width = w;public void print ()}System.out.println (length "* + width) ;public double area()return length width;public double perimeter ()return 2 * length + 2 width;}Which of the following statements correctly instantiates the Rectangle object myRectangle?(i) myRectangle = new Rectangle (12.5, 6);(ii) Rectangle myRectangle = new Rectangle (12.5, 6);(iii) class Rectangle myRectangle = new Rectangle (12.5, 6);a. Only (i)b. Only (ii)c. Only (ii)d. Both (ii) and (iii)

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MysteryClass -first: int -second: double; +MysteryClass () +MysteryClass (int) +MysteryClass (double); +MysteryClass (int, double) +setData (int, double): void +getFirst (): int +getSecond(): double +doubleFirst (): int +squareSecond (): double +print (): void +equals (MysteryClass): boolean +makeCopy (MysteryClass): void +getCopy () : Mysteryclass 46. Which of the following would be a default constructor for the class MysteryClass shown in the figure above? public MysteryClass () { setData (0, 0.0); ) b. public MysteryClass (0, 0.0) ( set Data (); } c. public MysteryClass (0) ( setData (0, 0.0); } d private MysteryClass (10) { setData (); }

MysteryClass -first: int -second: double; +MysteryClass () +MysteryClass (int) +MysteryClass (double); +MysteryClass (int, double) +setData (int, double): void +getFirst (): int +getSecond(): double +doubleFirst (): int +squareSecond (): double +print (): void +equals (MysteryClass): boolean +makeCopy (MysteryClass): void +getCopy () : Mysteryclass 46. Which of the following would be a default constructor for the class MysteryClass shown in the figure above? public MysteryClass () { setData (0, 0.0); ) b. public MysteryClass (0, 0.0) ( set Data (); } c. public MysteryClass (0) ( setData (0, 0.0); } d private MysteryClass (10) { setData (); }

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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Date -day: int -month: int -year: int +Date() +Date(int, int, int) +Date(Date) +getDay(): int +set Day (int): void +get Month(): int +setMonth(int): void +getYear(): int +setYear(int): void +show(): void Employee #employeeId: int #dateEmployed: Date: + Employee() +Employee(int, Date) +Employee (Employee) +getEmployeeId(): int +set EmployeeId(int): void +getDateEmployed(): Date +setDate Employed (Date): void +show(): void Contract Worker -durationOfContract: int +ContractWorker() +ContractWorker(int, Date, int) +ContractWorker (ContractWorker) +getDurationOfContract(): int +setDurationOfContract (int): void +show(): void Manager -department: string +Manager() +Manager(int, Date, string) +Manager (Manager) +getDepartment (): string +setDepartment (string): void +show(): void Using the UML Diagram provided, assuming that all classes have been implemented, write code snippets in C++ or Java to demonstrate sub-type polymorphism using only the classes from the diagram.
Hello all! Need some help with this assignment. Need to create an array of 8 employees ( see image for details ) Thank you!
Create a class Rectangle with length and breadth as private data members and also provide the following member functions: getdata(): gets the length and breadth of rectangle. calarea(): return the area of the rectangle. calperi(): return the perimeter of the rectangle. issquare(): return true if the rectangle is square
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