Overriding is useful when a method has the same signature and type as a method in the parent class. a local variable has the same name as an instance variable. O you want to change the return type of a method. O a method has the same signature as another method in the same class.

Overriding is useful when a method has the same signature and type as a method in the parent class. a local variable has the same name as an instance variable. O you want to change the return type of a method. O a method has the same signature as another method in the same class.

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

See similar textbooks

Related questions

Q: What are the advantages of passing this data into a method as opposed to just passing it into the…

Q: Parent Class: Food Write a parent class called Food. A food is described by a name, the number of…

A: 1. Declare a public class named "Food".2. Define private instance data variables: name (String),…

Q: class City(object): county = "Lake" population = 3000000 def -_init__(self, name, state): self.name…

A: Task : Given the class City in python. The task is to find the set of commands that performs the…

Q: You cannot use the isinstance function to determine whether an object is an instance of a subclass…

A: True

Q: rview In this task, you will try to create a class called Course and a test class that creates…

A: I have written JAVA Program:

Q: Programming exercise (in java eclipse , please add comment for each step)thank you Create a class…

A: The java program is given below:

Q: e for the miscommunication, The language is in Python Create a simple empty Vehicle class. Update…

A: It is defined as a simple, general purpose, high level, and object-oriented programming language.…

Q: A program is being written by a team of programmers. One programmer is implementing a class called…

A: Class: class is user defined blueprints or prototypes from which object's are creates. It…

Q: If we do not override the toString method in a class, the toString method for the Object is called.…

A: The correct answer for the given question is provided below.

Q: What method is automatically executed whenever a new instance of the class, which the method belongs…

A: The solution to the given problem is discussed below.

Q: Parking Ticket Simulator For this assignment you will design a set of classes that work together to…

A: The below program is solved using C++ Language:

Q: It is possible for a class to have more than one constructor. A) This is correct. B) The answer is…

A: Task :- Choose the correct option for given statement about constructors.

Q: You are in process of writing a class definition for the class Book. It has three data attributes:…

A: 1) Below is program that Creates a Book Class with private attributes title, author and publisher,…

Q: True/False: When instantiating an object of an abstract class, you can do it with the keyword new.

A: Abstract Class: Like Interfaces, an abstract class is an incomplete class. They have abstract…

Q: Part 1: Test Program Write a program to test all test cases outlined in the test plan. For each…

A: Description The required code for testing the application is given in the next steps. The output is…

Q: Modify the student class presented in this chapter as follows. Each student object should also…

A: The c++ program is given below:

Q: Code a copy method for an Inventory class. The fields are itemNo and itemName. //Method header. {…

A: Inventory copy(int itemNo,String itemName){ Inventory copyObject = new Inventory(itemNo,itemName);…

Q: Must be written in Python. Please include docstring and show how output should look like. Remember…

A: Python Code #LineSegment.py : #Point class definition class Point : #parameterized constructor…

Q: Write an equals method for the StepsFitnessTracker class that tests whether the one object is equal…

A: Actually, program is a executable software that runs on a computer.

Q: test various operations on a point.

A: // file-name : Point.java // PART 1 of the question import java.lang.Math.*; public class Point {…

Q: What are the advantages of passing this data into a method as opposed to just passing it into the…

A: The data which is passed to the method is used inside the method to accomplish the tasks.

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

Overriding is useful when
a method has the same signature and type as a method in the parent class.
O a local variable has the same name as an instance variable.
O you want to change the return type of a method.
O a method has the same signature as another method in the same class.

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Step 3

VIEW

Step by step

Solved in 3 steps

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, computer-science and related others by exploring similar questions and additional content below.

Similar questions

The reference this can be used to refer to an object or to invoke another constructor of the same class. True False
True or False An interface can be used to define a set of methods that a class must implement.
1. For methods parameters are specified in the method definition, arguments are provided during a method call arguments are specified in the method definition, parameters are provided during a method call arguments override parameters parameters encapsulate arguments 2 Local variables are not automatically initialized. True False 3 Composition refers to an 'is-a' relationship. True False 4 Class constructors must be declared with a return type equal to the class. True False 5 Object instances are created using the “new” keyword. True False
Under which of these conditions overloading a method would work (ie: the class will contain two methods with the same name)? O The methods have different numbers of parameters. O Two methods with the same name can never be included in the same class. O The methods have different parameter names. O The methods have different return types.
What are the advantages of passing this data into a method as opposed to just passing it into the current class object?
public class Cat { private int age; public Cat (int a) { age = а; } public int getAge() { return a; } } Which of the following best explains why the getAge method will NOT work as intended? The instance variable age should be returned instead of a, which is local to the constructor. The variable age is not declared inside the getAge method. The getAge method should be declared as private. The getAge method should have at least one parameter.
Write a member method for the Team class named : calculatePercentage that it will calculate and return the winning percentage of a team. The winning percentage is calculated as follows: wins / ( wins + losses)
Help me solve this in Java, don't make it to complicated.
What happens if you write a class with no constructor whatsoever?
Written in Python It should have an init method that takes two values and uses them to initialize the data members. It should have a get_age method. Docstrings for modules, functions, classes, and methods
a- Write a class definition for Student containing the following instance variables and methods: b- Create an object of this class c- Call the method to calculate and set average_test d- Print average test self. name self. test1 self. test2 self. average test A constructor to accept name, test1 and test2 as parameters and assign them to instant variables. A method to calculate and set averave test (each test worth 50%) A method to get average_test
CSC 1302: PRINCIPLES OF COMPUTER SCIENCE II Lab 6 How to Submit Please submit your answers to the lab instructor once you have completed. Failure to submit will result in a ZERO FOR THIS LAB. NO EXCEPTIONS. The class diagram with four classes Student, Graduate, Undergraduate, and Exchange is given. Write the classes as described in the class diagram. The fields and methods for each class is given below. Student Exchange Graduate Undergraduate Student: Fields: major (String) gpa (double) creditHours (int) Methods: getGpa: returns gpa getYear: returns “freshman”, “sophomore”, “junior” or “senior” as determined by earned credit hours: Freshman: Less than 32 credit hours Sophomore: At least 32 credit hours but less than 64 credit hours Junior: At least credit hours 64 but less than 96 credit hours Senior: At least 96 credit hours Graduate:…