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.

Q: Why abstract classes cannot have any objects? Briefly explain.

A: ABSTRACT CLASS: Abstract classes are basically those classes that are declared as abstract. The…

Q: Question 15 A class can inherit from just one base class, but it can implement multiple interfaces…

A: Here is your solution -

Q: In order to qualify as a subclass of an abstract class, a class must offer concrete implementations…

A: Introduction: In computers, abstract type in programming languages is a non-navigable type in a…

Q: 4. Abstract classes and interfaces can both be used to specify common behavior of objects. How do…

A: Abstract class  It is a class that is declared as abstract —it may or might not include abstract…

Q: 1.Draw the Class diagram(UML Diagram). 2.Write a JAVA program for Student Information using…

A: What is Class Diagram? A Class Diagram is a structure which is static in nature that gives an…

Q: Answer the two questions on the images

A: Inheritance: In Java, inheritance is a mechanism that allows a class to inherit properties and…

Q: Abstract classes and interfaces may both be used to specify common object behaviour. Is an interface…

A: Find the answer with explanation given as below :

Q: 3. What is the difference between method overriding and method overloading?

A: 3. What is the difference between method overriding and method overloading? Method…

Q: Write an essay that answers t on: what is the difference bet nd an abstract class?

A: The abstract class has the following properties:- Abstract classes may or may not have abstract…

Q: What is the purpose and benefit of private members in a class? Check all that apply. O Object data…

A: options a,b,d are correct we use private keyword for the purpose of private members in a class.…

Q: Which of these statements IS NOT true regarding design by contract.   Question options:   Creating…

A: Thе question is asking which of the following statеmеnts is NOT truе rеgarding dеsign by contract.…

Q: Which of the following are incorrect? Select 3 correct answer(s) An abstract class contains…

A: In object-oriented programming, a constructor is a special method that is called when an object is…

Q: Please do all the true or false question. Complete fully.

A: answer explanations: 1. yes, an abstract class can have implemented method. 2. No, it is not…

Q: When should an abstract class be used, when should an interface be used, and when should both be…

A: According to the provided information: We need to define the use of an abstract class, interface…

Q: Which of the following is true about abstract classes? Note that if a class can be sub-classed, this…

A: Answer:- Abstract classes cannot be instantiated, but they can be sub classed. Explanation:- Аn…

Q: All of the abstract methods of the parent class must be implemented by any subclass. Do you think…

A: It is correct that in object-oriented programming languages that support inheritance and abstract…

Q: The intent of the factory method pattern is to allow a class to differ . to subclasses Select one:…

A: We know that the meaning of keyword instantiation is that, the new operator will instantiate a class…

Q: i. Interface to Interface inheritance is possible. ii. Interfaces have only abstract methods. iii.…

A: Correct option is a iii iv v  are wrongly stated. The explanation is give below.

Q: Define a Card class which contains three PRIVATE (why?) variables for card suit, face value and the…

A: In this implementation, the variables for suit, face value, and isDrawn are made private because we…

Q: If you could solve please contact me to send continuation of the task

A: EXPLANATION OF THE PROGRAM: Make a Measurable interface. In this interface, define a single…

Q: In your own words, describe the relationship between classes and objects

A: Introduction: A member (or instance) of a class is an object, and objects inherit the class's…

Q: Explain the advantages of passing this data to a method rather than the current class object…

A: According to the information given:- We have to define advantages of passing this data to a method…

Q: Make sure you know the difference between an abstract class and an interface and constructors.

A: Identify the differences between the function Object() { [native code] } and the method:…

Q: Abstract classes and interfaces may both be used to accomplish the goal of defining the behaviour of…

A: In object-oriented programming, abstract classes and interfaces are two important concepts used to…

Q: Class A is the parent class, while classes B and C are the subclasses of A. Both B and C contain…

A: In object-oriented programming, organizing classes in a hierarchy is crucial for reusing code and…

Q: What is the design pattern depicted in the diagram below? The intent of this design pattern is to…

A: A) Factory Method Design Pattern   Explanation: A Factory Pattern, also known as a Factory Method…

Q: 1. Create (the package) as (P1) and another as (P2). 2. Create an Interface (named Human) inside…

A: A class is the basic building block of object oriented modelling. It has data and operations on that…

Q: When should one use an abstract class, when should one use an interface, and when should one use…

A: the solution is an given below ;

Q: class Car { } public Car() { } What happens if you try to run new Car();

A: Answer:

Q: In order to qualify as a subclass of an abstract class, a class must offer concrete implementations…

A: Abstract category: The name for a class that is declared abstract is an abstract class. Both…

Q: When should an abstract class be used, when should an interface be used, and when should both be…

A: Introduction: Abstract reasoning, sometimes referred to as abstract thinking, is the capacity to…

Q: Abstract classes and interfaces may both be used to accomplish the goal of defining the behaviour of…

A: When designing object-oriented systems, developers often face the decision of whether to use an…

Q: A subclass of an abstract class must provide concrete implementations for each of the parent class's…

A: A Subclass of an Abstract Class: Abstract Map, a component of the Collections Framework, is an…

Q: Question Kh  Write the definition of classes and interfaces in the given diagram using following…

A: Here is your solution step by step -

Q: Step 1: Create the abstract class that has following methods. • Calculate the area of…

A: Answer:

Q: we have learned about interfaces knowledge. Interfaces are preferred to define a common supertype…

A: What exactly is your question? Mention your question clearly...