What is true about private fields of a class? They must be used with private methods. They are accessible from anywhere inside or outside of a class. They can never be used in a class. They can be accessed only by methods inside the class they are associated with. Which of these keywords is used to refer to a member of a base class from a subclass? power super this upper Which of the following is true about abstract classes? Note that if a class can be sub-classed, this simply means that it can be derived from. Abstract classes can only contain abstract methods. They cannot be sub-classed. Abstract classes cannot be instantiated, but they can be sub-classed. Abstract classes can only contain abstract methods. They can be sub-classed. Abstract classes can be instantiated, but they cannot be sub-classed.

Q: 10 A class has to necessarily be declared as abstract class if

A: Required:

Q: What is a characteristic of static members? O a. For every object created, there is only one field…

A: About Characteristics of static members

Q: 1- Create a class SchoolKid that is the base class for children ar a school . It should have…

A: Inheritance:- It is the Java method by which one class is permitted to inherit the characteristics…

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: When the inheritance is private, the private methods/functions in base class are in the derived clas…

A: When the inheritance is private, the methods/functions in base class are________in the derived…

Q: Suppose A is an abstract class, B is a concrete subclass of A, and both A and B have default…

A: 1. The correct answer is option (B) A a = new B(); Explanation : Here A is an Abstract class and you…

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: List the privacy principles regarding public base class and private base class and their derived…

A: The question asked is:- The privacy principles regarding public base class, and private base class…

Q: What are the similarities between structs and classes? (Select all that apply)   - Private data…

A: Structures and classes are the two most important data structures that are used by programmers to…

Q: Which of the following statements are true. a) An abstract method contains a signature but no code…

A: 1) Abstract classes and methods are important concepts in object-oriented programming that help…

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: Which one is true? A) An inner class can be declared public or private subject to the same…

A: All the statements are true. So option A,B,C,D are correct

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: True or false?(a) You can override a nonprivate method defined in a superclass.(b) You can override…

A: a)  All non-private methods are inherited by the sub-class from its super-class. A non-private…

Q: Regarding the information hiding principle; A: Briefly describe it. B: State the advantages. A: How…

A: While doing programming in any programming language, you need to use various variables to store…

Q: In object oriented programming, inheritance improves code readability and maintenance by allowing…

A: Based on object oriented Programing

Q: Please explain, in light of the aforementioned three reasons, why it is preferable to have accessors…

A: In object-oriented programming, access modifiers such as public, private, and protected are used to…

Q: Question 2 Next you will need to create classes to implement the interface and extend the abstract…

A: class Circle extends AbstractShape{    private double m_radius;        //Constructor    public…

Q: Fill in the blanks in the following table which describesthe access levels in a derived class's…

A: In object oriented language, for data hiding and data protection three access specifiers are used.…

Q: A derived class... a. Can contain more attributes (data members) and behaviors (methods) than its…

A: a,b,d only.

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: Create a Car class in C++.that has the following: The class should contain the attributes of color,…

A: Step 1 : Start Step 2 :  Define the class Car and create the fields for the class as : color , make…

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: Design a class named Point that meets the following requirements: Two data fields x and y for…

A: Start. Define a Point class with x and y integer fields, and constructor methods for setting values…

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: Design and implement a Restaurant class with at least three meaningful attributes and two methods.…

A: Below is the complete solution with explanation in detail for the given question about creating a…

Q: If a class needs to inherit from multiple parent classes, the parent classes must  a. be inherited…

A: Inheritance:- Inheritance is a concept in object-oriented programming (OOP) in which a class, called…

Q: Create a class SchoolKid that is the base class for children ar a school . It should have attributes…

A: The given below program is in java.

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: Given the following definitions: public abstract class Manager extends Employee { ... } public class…

A: Introduction: Class is one of the concepts in the object-oriented programming paradigm and it’s…

Q: QUESTION 2 A protected member of a class may be directly accessed by O methods of the same class…

A: Given:

Q: Create an abstract class Product  with following  Properties Price (Decimal), Code (string),…

A: NOTE - I have used the Java programming language. Here I have created all the classes and interface…

Q: In object oriented programming, inheritance improves code readability and maintenance by allowing…

A: Based on object oriented programing

Q: Select the answer that best describes the following statements: 1. Usage of static variables…

A: Introduction: Static Variable: Static Variable is a member variable of a given class which is shared…

Q: Given the following classes, answer the below questions.  Person (abstract class) that has the…

A: -----------------------------------------Person.java------------------------------------   public…

Q: How do we gain access to private attributes outside of the class they are defined?     Through…

A: Question 1 The correct answer is: Through public methods. In object-oriented programming, private…

Q: QUESTION 1 Static fields in a class O can be referenced as a field of any instance of the class. O…

A: The suitable option is (a).

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: Match the following: A constructor methods . A class that contains no methods (other than…

A: given data

Q: ClassA + retrace(): void 1 > Retraceable + retrace(): void 1 ClassB + retrace(): void

A: Abstract class: The abstract class is declared with the keyword abstract. The abstract class can…

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

A: A class which is declared with the abstract keyword is known as an abstract class in java. It can…

Q: Which of the following statements regarding abstract class is not true? An abstract class cannot…

A: Introduction: They are classes that cannot be instantiated directly but are meant to be subclassed…

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: