Can a class be a super class and a sub-class at the same time? Give example.

Q: Fill in the blanks to indicate the type of relationship between the classes listed below (use IS_A,…

A: According to the question we need to answer:

Q: (b) Given the following class: public class Hand { (i) private int value; public int getValue () {…

A: Note: Due to company policies I am compelled to solve only one question and that is the first…

Q: Can we use a default constructor of a class even if an explicit constructor is defined?

A: 1) The default constructor is the no-argument constructor automatically generated unless you define…

Q: How do you define a class that extends a superclass? What is super()? How do you invoke the…

A: Super() : The concept of inheritance is achieved in python through the super() function. The super()…

Q: Construct a Course class that consists of course name, course code and lecturers' name.…

A: 1) Below is C++ program to create course class with variables course name, code, and lecture name.…

Q: What is the superclass and what is the subclass in the following line? public class Pet extends Dog

A: What is the superclass and what is the subclass in the following line? public class Pet extends…

Q: Can a derived class (i.e., Subclass) directly invoke a private method of the base class (i.e., Super…

A: Given: Can a derived class (i.e., Subclass) directly invoke a private method of the base class…

Q: What are the differences between abstract classes and concrete classes?

A: Abstract Class: Abstract class in java is declared by using keyword abstract. An object of abstract…

Q: What is wrong in the following abstract class definition? abstract class XY { abstract int…

A: According to the  information given:- We have to find out what is wrong in the following abstract…

Q: When dealing with objects inherited from other classes, when does explicit casting need to be used?

A: Explanation: Give an example of when it is required to utilise explicit casting when dealing with…

Q: An unspecified data type can be used for both the parameters and the return type just for abstract…

A: All variables  must have a data type. So option 1,3, and 4 are incorrect

Q: How many classes can one class extend from? In other words, how many super classes can one class…

A: In java,one class has only one super class as it doesnt support multiple inheritance. 1 is the…

Q: Give four instances where this keyword has been used in class declarations.

A: Class declaration: The name of the class, as well as its other properties, such as whether it is…

Q: You only can instantiate concrete classes, not abstract ones. But you can extend abstract classes as…

A: this statement is true You can only instantiate concrete classes, not abstract ones, but you can…

Q: Implement a class Car

A: public class Car{  private double fuelEfficiency; private double fuelLevel;  Car(double efficiency){…

Q: Can we not use an object of the Parent Class in the Child Class and use all its features?

A: Can we not use an object of the Parent Class in theChild Class and use all its features?

Q: Below code is showing compilation error? State reason. abstract class A { } class B extends A { }

A: As the Code Above is having Abstract Class So According to flow

Q: Describe some facts about public and private members of a class.

A: Public members of a class: The public class member will be available to everyone. The keyword…

Q: The pillar that allows you to build a specialized version of a general class, but violates…

A: Object-Oriented programming: It is also called OOPs. OOPs, programming languages are those languages…

Q: Super-class

A: A superclass is the class from which numerous subclasses can be created. The subclasses inherit the…

Q: implement a super class person make two classes student and instructor that inherit from person . a…

A: here in given question ask for a program in python in inheritance as per requirement of question.

Q: Class A What does this UML mean? (I left data members and methods out) a) Class A aggregates Class B…

A: Answer : From the above diagram it is clear that class A aggregates Class B  and class A is…

Q: A. The members of classes can be protected by the access modifier, such as private, public, no…

A: As per guidelines we can answer only one question for answer of other questions please ask…

Q: 1.Class Is A Template Or Blueprint. Justify With Reason.

A: The properties and member variables are grouped together in a module is known as a class. The class…

Q: The pillar that allows you to build a specialized version of a general class, but violates…

A: Answer is given below .

Q: Create a class point3D (from existing class point given in lecture; i.e: using inheritance) with the…

A: public class Point{    //declaring inherited instance variables    private int x;    private int y;…

Q: Think of an example of two classes where one class is a special case of the other, and write…

A: We will solve this problem in Java Language. Animal class is going to be the first class and Dog…

Q: What is true about Class.getInstance()? a) Class.getInstance calls the constructor b)…

A: Answer d) Class.getInstance creates object if class does not have any constructor

Q: Consider the definition of the following class: class Counter{ private: int x; double y;…

A: #include<iostream> using namespace std; class Counter{ private : int x; double y; public:…

Q: Can we declare a class as Abstract without having any abstract method?

A: It is only possible to use an abstract method in an abstract class, and it does not have a body. The…

Q: What is a singleton class? Give a practical example of its usage.

A: Singleton class: Singleton is nothing but a concept of object-oriented programming language which…

Q: a) What are constructor and destructor? Explain with reference to an example class

A: Constructors are special class functions which performs initialization of every object. The Compiler…

Q: Can abstract classes also contain abstract properties?

A: “Yes”, an abstract class can also contain abstract properties. Justification: An abstract property…

Q: (3) Briefly (in just a few words), describe the difference between an instance and a class

A: Class: In Object Oriented Programming, Class is a Building block and it acts as a container contains…

Q: s there any difference between abstract and concrete class? Give proper justification.

A: Abstract Class: An abstract class is a type of class in Java that is presentby  abstract keyword. An…

Q: Could it ever make sense to define a class as abstract if it has no abstract methods? Discuss this

A: Abstract class : Abstraction means hiding the implementation from user and showing only essential…

Q: Design a super class Person and subclasses – Student and Instructor using your idea obtained in…

A: Note: Programming language is missing in the question. So we will answer this program in C++. If you…

Q: In what kind of situation would you want to use an abstract class instead of a base class?

A: In Java programming, an abstract class is a special class that is mainly used while deriving some…