In Java, declaring a class abstract is useful ...When it doesn't make sense to have objects of that class.To prevent developers from further extending the class.When default implementations of some methods are not desirable.When it makes sense to have objects of that class. Which statement is true about interfaces?An interface cannot have static members.O An interface can extend several other interfaces.An interface can be final.OAn interface can have a private method.

When it doesn't make sense to have objects of that class To prevent developers from further extending the class When default implementations of some methods are no When it makes sense to have objects of that class.

When it doesn't make sense to have objects of that class To prevent developers from further extending the class When default implementations of some methods are no When it makes sense to have objects of that 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 two characteristics of the constructor set it apart from the class's methods in your opinion?

A: Definition: A constructor's syntax is class name (parameter) A method declared inside of a class has…

Q: help with python...pste indented code plzz Implement the following: 1) Define a class Job with…

A: Coded using Python 3.

Q: Equivalence classes may lead to the risk of eliminating test cases that might reveal defects. True…

A: Answer :- False

Q: Answer These 2 question Acrroding To this Code?Q1: There are common attributes and methods between…

A: 1. Given 3 java classes kid, trainer and group. Kid and trainer class have almost same attributes…

Q: What do you consider to be the three distinct levels of testing that take place inside a class?

A: When it comes to testing a class, there are three distinct levels of testing that are typically…

Q: What is the difference between equals() and == ? == looks to see if they are identical objects…

A: Answers: Difference between equal() and == : == Is used for reference of the Comparison. equal()…

Q: What two characteristics of the constructor set it apart from the class's methods in your opinion?

A: Given: For a function Object() { [native code] }, the code is class name (parameter)A method inside…

Q: What advantages does it have to provide this information into a method rather than the active class…

A: Answer to the given question Providing information into a method instead of the active class object…

Q: Is there a reason we can't make use of an object with all the characteristics of the parent class in…

A: Given this: The question is if it is possible to use a parent class object in a child class and…

Q: Design and implement a class called Bug, which represents a bug moving along a horizontal wire. The…

A: JAVA CODE : // Implement a class class Bug { private int location; private String path; public…

Q: What two characteristics of the constructor set it apart from the class's methods in your opinion?

A: Definition: A constructor's syntax is class name (parameter) A method declared inside of a class has…

Q: Create a class diagram for a Nutrition Clinic that contains a class called Person, its attributes…

A: As per the given question, the required class diagram should have following classes: Person…

Q: reate a java program following these guidelines that would be much appreciated. helpful comments in…

A: Java used to answer this question

Q: What are the two characteristics of the constructor that make it seem quite different from the…

A: Introduction The syntax for a constructor is class_name(parameter) The syntax for a method defined…

Q: You will need to devise a strategy to avoid inadvertent corruption of class fields.

A: In order to avoid inadvertent corruption of class fields, here are some strategies that can be…

Q: When would you be most likely to use an abstract class? when you need to derive a class from…

A: An abstract class is most likely to be used when a superclass is required that should be not be…

Q: Question 3 (a) Design and implement a class called TaxiFare that includes the following instance…

A: Kindly Note: As per our guidelines we are supposed to answer only first question. Kindly repost…

Q: In your drone application of precision agriculture create an object diagram (showing qualities of…

A: Object diagram of Drone application of precision agriculture :-

Q: Why can't we use an object from a Parent Class in a Child Class and take use of all its features?

A: Given: Can we use Parent Class object in a Child Class and take use of all of its features? is the…

Q: Consider a class ScienceFairProjectRating that will be used to help judge a science fair project.…

A: Answer : public class ScienceFairProjectRating{ //attributesString name_of_project;String…

Q: In this phase you’ll be writing code within the methods of your classes to make the tests pass.…

A: Code: BankAccount.java import java.util.*; public class BankAccount { //All the instance…

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

In Java, declaring a class abstract is useful ...
When it doesn't make sense to have objects of that class.
To prevent developers from further extending the class.
When default implementations of some methods are not desirable.
When it makes sense to have objects of that class.

Which statement is true about interfaces?
An interface cannot have static members.
O An interface can extend several other interfaces.
An interface can be final.
O
An interface can have a private method.

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

Match the following: A class that contains no methods (other than constructors) that change any of the data in its object modifier means that there are no restrictions on where an instance variable or method can be used hiding implementation details is done by marking data and methods as When we call a method in Java using class type parameters Overloading is achieved when two or more methods in the same class have the same…
Write a code using abstract data types, classes, and inheritance methods as in the example below. Do not use the car class exemplified, but think of any similar use of such a class and adapt it to your idea. Make sure to follow all the requirements set below: Creating the Car Class Motorvehicles Solutions, Inc. is a business that sells cars and leasing services. You are a programmer in the company's IT department, and your team is designing a program to manage all of the cars that are in the inventory. You have been asked to design a class that represents a car. The data that should be kept as attributes in the class are as follows: The name of the car's manufacturer will be assigned to the __manufact attribute. The car's model number will be assigned to the __model attribute The car's retail price will be assigned to the __retail_price attribute The car's leasing price will be assigned to the __leasing_price attribute The class will also have the following methods: An __init__…
Design, implement and test a class that can be used to hold information about a musical note. Test it with an appropriate driver program. DESIGN REQUIREMENTS A programmer MUST be able to set and retrieve the length of the note and the value of the note. The length of a note may be a sixteenth note, eight note, quarter note, half note, or a whole note. The note’s value is an integer. it is specified by counting how far the note lies above or below the A note that orchestras use in tuning ( https://en.wikipedia.org/wiki/A440_(pitch_standard) if needed to check ) . In counting "how far", you should count every key, both the white and black notes on a piano. So the A note above Middle C would have a value of 0. The A note one octave above that would have a value of 12. The default constructor should set a note to a A440 (an A note of frequency 440Hz) quarter note. Include methods to set a note to a specified length and value. Write methods to retrieve information about a note,…
Correct and detailed answer will be Upvoted else downvoted. Thank you
Brainstorm below how you want to organize a game state class. This class keeps track of all information required to run the game. Remember, a class is composed of: State (data that is stored about an object) Behavior (behaviors of an object) For example, if you were to represent a Wordle game as a class, what data is stored within the game you’d want to have as member variables? What actions/behaviors can be taken?
Java Programming Please help me with this Java Progamming project NOT GRADED. Practice homework Please comment the code well and organize the classes so I can understand. Thank you! If solution if the one that is desirable, I will upvote! I really appreciate this, Bartleby! Waiting Times should not be negative. You sent back a solution but the waiting time was negative and that was incorrect. Please take your time and help me with this.
When should you use an abstract class? Group of answer choices 1. All options are correct. 2. When two or more classes will share identical methods, so that they can be moved into the abstract class. 3. When you want to make an object that is not concrete, and instead is more of an idea. 4. When you have classes that will share method names, but can have different implementations. 5. There is no need for abstract classes. Instead, interfaces are a better programming choice.