private String name; private int code; and following constructor: public Item(String n, int c) { name = n; code = c; } Now, we want to write a class called Electronicitem that inherits th properties of class Item as follows having only one data field: public class Electronicitem extends Item { private double price; The constructor of class Electronicitem can be written as follows: a. public Electronicitem(String n, int c, double p) { this(n, c); price = p; } b.public Electronicitem(String n, int c, double p) { super(n, c); price = p; } c. public Electronicitem (String n, int c, double p) { Item.super(n, c); price = p; } d. public Electronicitem (String n, int c, double p) { Item.name = n; Item.code = c; price = p; }

private String name; private int code; and following constructor: public Item(String n, int c) { name = n; code = c; } Now, we want to write a class called Electronicitem that inherits th properties of class Item as follows having only one data field: public class Electronicitem extends Item { private double price; The constructor of class Electronicitem can be written as follows: a. public Electronicitem(String n, int c, double p) { this(n, c); price = p; } b.public Electronicitem(String n, int c, double p) { super(n, c); price = p; } c. public Electronicitem (String n, int c, double p) { Item.super(n, c); price = p; } d. public Electronicitem (String n, int c, double p) { Item.name = n; Item.code = c; price = p; }

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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Question

Q1. Assume that class Item has following two private data fields:
private String name; private int code;
and following constructor:
public Item(String n, int c) { name = n; code = c; }
Now, we want to write a class called Electronicltem that inherits the
properties of class Item as follows having only one data field:
public class Electronicltem extends Item {
private double price;
The constructor of class Electronicltem can be written as follows:
3. public Electronicltem(String n, int c, double p)
{ this(n, c); price = p; }
O b. public Electronicltem(String n, int c, double p)
{ super(n, c); price = p; }
O c. public Electronicitem (String n, int c, double p)
{ Item.super(n, c); price = p; }
%3!
O d. public Electronicitem (String n, int c, double p)
{ Item.name = n; Item.code = c; price = p; }

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