51. In copying, each reference variable refers to its own object.a, shallowb. deepC.methodd. object52. What is the default definition of the method tostring?There is no default definition; you must define the method yourself.b. It creates a string that is the name of the object's class, followed by the hash code ofthe object.It creates a string that is the name of the program.d. It creates a string that is the name of the package, followed by the name of the class,followed by the bash of the object.а.C.53. Suppose that Book is class with two instance variables-name of type String and numOfBooks of typeint. Which of the following would be appropriate syntax for the heading of a copy constructor for the classcalled Book?a. public Book (String n, int num)b. public Book ()c. public Book (Book b)d. public copyBook (String n, int num) public class Secretprivate int x;private static int y;public static int count;public int z;public Secret ()}X?t = 2{public Secret (int a)}{public Secret (int a, int b)}{public String toString()return ("x = "count = " + count);{public static void incrementY (){{54. How many constructors are present in the class definition above?C. 2d. 3b. 155. What does the default constructor do in the class definition above?a. Sets the value of x to 0c. Sets the value of x to 0 and the value ofz to 1d. There is no default constructor.b. Sets the value of z to 156. Based on the class definition above, which of the following statements is illegal?Secret.incrementY ();b. Secret.count++3Ba.c. Secret. 2++;d. None of these13

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copying, each reference variable refers to its own object. shallow 51. In а. с. method b. deep d. object 52. What is the default definition of the method tostring? There is no default definition; you must define the nmethod yourself. b. It creates a string that is the name of the object's class, followed by the hash code of the object. It creates a string that is the name of the program. d. It creates a string that is the name of the package, followed by the name of the class, followed by the bash of the object. a. С. 53. Suppose that Book is class with two instance variables-name of type String and numofBooks of type int. Which of the following would be appropriate syntax for the heading of a copy constructor for the class called Book? public Book (String n, int num) b. public Book () public Book (Book b) d. public copyBook (String n, int num) a. с.

copying, each reference variable refers to its own object. shallow 51. In а. с. method b. deep d. object 52. What is the default definition of the method tostring? There is no default definition; you must define the nmethod yourself. b. It creates a string that is the name of the object's class, followed by the hash code of the object. It creates a string that is the name of the program. d. It creates a string that is the name of the package, followed by the name of the class, followed by the bash of the object. a. С. 53. Suppose that Book is class with two instance variables-name of type String and numofBooks of type int. Which of the following would be appropriate syntax for the heading of a copy constructor for the class called Book? public Book (String n, int num) b. public Book () public Book (Book b) d. public copyBook (String n, int num) a. с.

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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please
Trace through the following program and show the output. Show your work for partial credit. public class Employee { private static int empID = 1111l; private String name , position; double salary; public Employee(String name) { empID ++; this.name 3 пате; } public Employee(Employee obj) { empID = obj.empĪD; пате %3D оbj.naте; position = obj.position; %3D public void empPosition(String empPosition) {position = empPosition;} public void empSalary(double empSalary) { salary = empSalary;} public String toString() { return name + " "+empID + " "+ position +" $"+salary; public void setName(String empName){ name = empName;} public static void main(String args[]) { Employee empOne = new Employee("James Smith"), empTwo; %3D empOne.empPosition("Senior Software Engineer"); етрOпе.етpSalary(1000); System.out.println(empOne); еmpTwo empTwo.empPosition("CEO"); System.out.println(empOne); System.out.println(empTwo); %3D етpОпе empOne ;
26. Assume the declaration of Exercise 24. A. Write the statements that derive the class dummyClass from class base as a private inheritance. (2 lines are { and }.) "A1 is { "A2 is "A3 is )) B. Determine which members of class base are private, protected, and public in class dummyClass. "B1 is dummyClass is a de
class Point { private: int x, y ; public: : x(u), y(v) {} Point (int u, int v) int getX) { return x; } int getY () { return y; } void doubleVal() { *= 2: y *= 2; } }; int main () { const Point myPoint (5, 3) myPoint.doubleVal() ; cout << myPoint.getX() << " " return 0; << myPoint.getY() << "\n"; }
3. private int X; public int z; public Secret () } 0 = X { public Secret(int a) } { public Secret (int a, int b) } { public String toString() '. + A + u = K ' + X + w count ! (qunoo + { public static void incrementY () } { 54. How many constructors are present in the class definition above? C. 2 d. 3 a. b. 1 c. Sets the value of x to 0 and the value of z to 1 d. There is no default constructor. 55. What does the default constructor do in the class definition above? a. Sets the value of x to 0 b. Sets the value of z to 1 56. Based on the class definition above, which of the following statements is illegal? Secret.incrementY(); b. Secret.count++; c. Secret.z++B d. None of these
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