In Java, inheritance is a mechanism that allows a subclass to ________ the properties and methods of a superclass.
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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:
In Java, inheritance is a
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- 4) True or False Inheritance allows a subclass to inherit properties and methods from a superclass 5) True or False A class can implement multiple interfaces. 6) What is the syntax for extending a class in Java? class Superclass extends Subclass class Subclass extends Superclass None class Subclass implements SuperclassWhen a variable declared in a subclass has the same name as a variable declared in a superclass, it is called a _______________ variable.Instructions JAVA LANGUAGE The Factory Method pattern provides an interface for creating objects in a superclass but allows subclasses to alter the type of objects to be created. Use NetBeans to create a Java program that implements this design pattern. Name your project TestFactory. Create an abstract superclass named Laptop. Any subclass of an abstract class must either implement all of the abstract methods in the superclass or be declared abstract itself. Copy the code below. abstract class Laptop { public abstract int getRAM(); public abstract int getSSD(); public abstract String getCPU(); public String toString() { return "RAM="+this.getRAM()+"GB, SSD="+this.getSSD()+", CPU="+this.getCPU(); } } Create a subclass named Minimum that extends your superclass. In this class, declare three (3) private variables with the following names and data types: ram (int) ssd (int) cpu (String) Copy the code below for the constructor of your Minimum class. This constructor has…
- 5) True or False A class can implement multiple interfaces. 6) What is the syntax for extending a class in Java? class Superclass extends Subclass class Subclass extends Superclass None class Subclass implements Superclass(JAVA) Create a class hierarchy to represent the different types of employees in an office who have the following job titles: manager, assistant, salesperson. Write an abstract base class called Employee that declares an abstract method: signature double calculateSalary() This class must also define the following attributes: name (String type), enrollment (String type) and base_salary (double type). Use encapsulation and provide a constructor that receives the corresponding values to be stored in the respective attributes. This abstract class must be extended by the other classes representing the types of employees, so the classes Manager, Assistant and Salesperson must be written. In each class you must override the method calculateSalario so that the salary calculation is done like this: The manager receives twice the base_salary, the assistant receives the base_salary and the salesperson receives the base_salary plus a commission defined in the constructor of his class. Create a…Variables having the same name as variables declared in a superclass are assumed to be the same as variables specified in a subclass.
- variables are variables that have the same name as variables that have been declared in a superclass and are declared in a subclass, respectively.1. Create an interface OnlineQuiz with the following details: Member variables: totalMarks=10 Member Methods: · nQuestions(): An abstract method that calculates and return the number of questions. Defined in subclass. · display(): An abstract method that displays all details. Defined in a subclass. 2. Create a class Staff that inherits OnlineQuiz with the following details: Member variables: · staffD // id of the staff string type · staffName // Name of the staff string type · nMCQ // Number of MCQ type questions int type · nTF // Number of true/false type questions int type · nMatch // Number of match type questions int type Member Methods: · Define the parameterized constructor to set the member variables. · Define the method nQuestions(): which calculate and return the total number of questions. Total number of question= nMCQ + nTF +…True or False:Unlike other members of a superclass, constructors of a superclass are not inherited by its subclasses. This means that you must define a constructor for a class or use the default constructor added by the compiler.
- Fill in the blanks: ________ is a technique for identifying which information should be hidden. _________ allows related classes to be organized in a hierarchical manner _____ enables code behave differently at different times during execution. _______ provides a kind of "multiple inheritance" which is not supported in Java. a. Container b. Abstraction c. Inheritance d. Object e. Interfaces f. PolymorphismTrue or False ___(4) An object of a subclass can be assigned to the variable of its superclass. ___(5) The Object class is the super class of any Java class. ___(6) An interface may include variables if needed.Java - If the programmer doesn't declare any constructors for an extended class, what constructors will be inherited from the superclass? How does this inherited constructor initialize new instance variables that are not part of the superclass?