class Animal { public String toString() { return "Animal"; } public String f() { return "Animal f"; } class Mammal extends Animal { public String g() { return "Mammal g"; } public String g() { return "Animal g"; } } class Dog extends Mammal { public String f() { return "Dog f"; } } class Reptile extends Animal { public String toString() { return "Reptile"; } } class Lizard extends Reptile { public String g() { return "Lizard g"; } Select True if the following declarations are legal, False otherwise: Lizard Godzilla = new Reptile(); [Select] Animal Simba= new Mammal(); [Select] Reptile Rango = new Lizard(); [Select] Animal []Ark = + {new Animal(), new Reptile(), new Lizard()}; [Select] Lizard []Hatchlings {new Animal(), new Reptile(), new Lizard()}; [Select]

class Animal { public String toString() { return "Animal"; } public String f() { return "Animal f"; } class Mammal extends Animal { public String g() { return "Mammal g"; } public String g() { return "Animal g"; } } class Dog extends Mammal { public String f() { return "Dog f"; } } class Reptile extends Animal { public String toString() { return "Reptile"; } } class Lizard extends Reptile { public String g() { return "Lizard g"; } Select True if the following declarations are legal, False otherwise: Lizard Godzilla = new Reptile(); [Select] Animal Simba= new Mammal(); [Select] Reptile Rango = new Lizard(); [Select] Animal []Ark = + {new Animal(), new Reptile(), new Lizard()}; [Select] Lizard []Hatchlings {new Animal(), new Reptile(), new Lizard()}; [Select]

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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Concept explainers

OOPs

In today's technology-driven world, computer programming skills are in high demand. The object-oriented programming (OOP) approach is very much useful while designing and maintaining software programs. Object-oriented programming (OOP) is a basic programming paradigm that almost every developer has used at some stage in their career.

Constructor

The easiest way to think of a constructor in object-oriented programming (OOP) languages is:

Question

class Animal {
public String toString() {
return "Animal";
}
}
class Mammal extends Animal {
public String g() {
return "Mammal g";
}
public String f() {
return "Animal f";
}
}
public String g() {
return "Animal g";
}
class Dog extends Mammal {
public String f() {
return "Dog f";
}
}
}
class Reptile extends Animal {
public String toString() {
return "Reptile";
}
class Lizard extends Reptile {
public String g() {
return "Lizard g";
}
}
Select True if the following declarations are legal, False otherwise:
Lizard Godzilla = new Reptile(); [Select]
Animal Simba= new Mammal(); [Select]
Reptile Rango
Animal []Ark
= new Lizard(); [Select]
=
↔
{new Animal(), new Reptile(), new Lizard()}; [Select]
Lizard []Hatchlings = {new Animal(), new Reptile(), new Lizard()};
[Select]

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