17. In an interface. can have concrete as well as abstract method all methods need to be concrete all methods need to be abstract except a concrete constructor all methods need to be abstract
Q: Static and instance methods have different properties.
A: Explanation: Static method definition: A static method is a non-instance of a class that does not…
Q: he distinction between dynamic and static binding of methods (i.e., between virtual and nonvirtual…
A: Binding means a mix of driving within the description of the road. the image below clearly shows…
Q: What is the difference between a concrete and an abstract class?
A: Find Your Answer Below
Q: Distinguish between constructor and method abstract class and interface
A: Below is the diff between class & interface. I hope this will help.
Q: When a class implements an interface with default methods and overrides them, the class inherits the…
A: When a class implements an interface with default methods and overrides them, the class inherits the…
Q: In a class definition, is the body of any method definition ever part of the class interface?
A: No
Q: A subclass of an abstract class must be able to do all of the things the parent class can do. True…
A: The answer of this question is as follows:
Q: Create an abstract class called Employee that has an abstract method called calculatePay() which…
A: Note :- You have not mention the language of the program, So I am doing your question in Java. Your…
Q: To implement an interface, a concrete class must implement AT LEAST ONE method heading. False. True.
A: Here is the answer:
Q: Defining two or more methods within the same class with same name but different parameters list is…
A: Defining two or more methods within the same class with same name but different parameters list is…
Q: An interface can have : instance variables. only method headings without implementation.…
A: Refer to step 2 for the answer.
Q: Explain in detail the difference between Constructors and Destructors with examples.
A: As per the question statement, It is asked to give difference between Constructors and Destructors…
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: To implement an interface, a concrete class must implement AT LEAST ONE of the method headers…
A: A concrete class is one in which all of its methods have been implemented. They can't have any…
Q: Create an interface that shall have 2 methods and one string type attribute, also create an…
A: Here I have first of all created an interface and in this interface, I have declared 2 methods and…
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: You can make a class abstract by declaring it with keyword abstract. An abstract class normally…
A: An abstract class is a class which can have 0 or more abstract methods An abstract class is declared…
Q: 1. Explain the importance of method signature in method overriding. 2. The system might want to use…
A: 1) The method signature is basically a declaration of the instance function in the base class so…
Q: 1. Can you declare a class that contains abstract methods a non-abstract class? 2. Can you declare…
A: 1. No, the abstract methods can't be declared in non abstract class, it is the same reason you can't…
Q: It has just one Main class which tests abstract class Animal and its 3 subclasses: Dog, Cat, and…
A: //declaring interfacepublic interface Talker{ //declaring abstract methods public void…
Q: The interface Speaker is describe below. public interface Speaker{ public void speak(); public void…
A: // Speaker.java // Speaker Interface public interface Speaker { public void speak(); public…
Q: It has just one Main class which tests abstract class Animal and its 3 subclasses: Dog, Cat, and…
A: Question given: A program code is given of driver class. Write all classes and their method that…
Q: Assignment: Write the class XXXX_Worker with constructors, accessors, mutuators, and a toString…
A: create XXXX_Worker class with instance data members as Worker Name and Number.declare constructors,…
Q: To implement an interface, a concrete class must implement AT LEAST ONE method headings listed in…
A: In general, an interface is a tool or a device that unrelated entities use to interact.
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: Question 3: 1. Explain the importance of method signature in method overriding. 2. The system might…
A: 1.) The method signature is basically a declaration of the instance function in the base class so…
Q: Given: interface B B){} {} void methodA(); cannot have a constructor cannot have an instance…
A: Disclaimer : Answering only for the first one : We cannot have a constructor within an interface in…
Q: Match the following: A constructor methods . A class that contains no methods (other than…
A: given data
Q: Write the difference between interface and abstract class
A: Interfaces and abstract classes are features of object-oriented programming languages (Java, C#) The…
Q: QUESTION 5 All methods in an abstract class must also be declared abstract. O True False
A: Abstraction is a process of hiding the implementation details and showing only functionality to the…
Q: Design a class named Customer with field holding for customer's name, address, and telephone number.…
A: public class Customer { //declaring variables private String name; private String address;…
Q: i. When inheriting an Interface from an Interface, the newly created Interface should include all…
A: ANSWER : Option a is correct answer. Classes cannot inherit from an interface, since an interface is…
Q: To implement an interface, a concrete class must implement AT LEAST ONE method heading
A: The answer:
Q: Abstract methods must be implemented by any subclass of an abstract class that is derived from it.…
A: Given: Abstract methods must be implemented by every abstract class subclass that is inherited from…
Q: UESTION 16 What must be true of a class with one abstract method? O The class must also implement…
A: 16) The abstract method must have the static modifier 17) Because we're using an array, all pets…
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: Method overriding is combination of inheritance and polymorphism? a) True b) false
A: Question. Method overriding is combination of inheritance and polymorphism? a) True b) false
Q: Write a class sum: There are two abstract methods, the child class these must implement methods.…
A: Note: This is a multiple-question-based problem. As per company guidelines, only the first questions…
Q: To implement an interface, a concrete class must implement AT LEAST ONE method headings listed in…
A: Required: To implement an interface, a concrete class must implement AT LEAST ONE method headings…
Q: Create an abstract class named capstone with necessary abstract methods in Package 1 and define…
A: 1. create an abstract class to let the other class know.2. create base class which extends the…
Q: A(n) __________ is a method that appears in a base class but expects to be overridden in a derived…
A: Abstract class: An abstract class is a class that acts as a base class for a derived class that may…
Q: constructors and static method can be declared abstract?
A: Given To know about the statement constructors and static methods can be declared abstract.
Q: Question 3: 1. Explain the importance of method signature in method overriding. 2. The system might…
A: Method Signature In Java, a method signature is essential for the strategy presentation. It's the…
Q: 1. A method stub is a) a short method b)a method with an abrupt end c)a method whose header has…
A: While doing programming in any programming language, you need to use various variables to store…
Q: Write an abstract class, it can be anything well defined from the very basics.
A:
only write the answers. Explanation is not needed. thank You.
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- Define the Circle2DYourLastName class that contains: Two double data fields names x and y that specify the center of the circle withgetter methods. A double data field radius with getter method. A constructor that creates a circle with specified x, y, and radius. A method findTypeOfIntersection to determine and return types ofintersection as string (contained, overlap, or separate).Design a user class that prompts the user to enter the coordinates of the center andradius of two circles and displays the type of intersection. Allow the user to repeat yourprogram using a ConfirmDialog Box.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.a- Prepare a MS. Word document that contain a UML represent a class ofyour choice, the class should satisfy the following properties:- Consists at least three private attributes.- Two constructors one with no arguments and one with arguments.- Getter and setter methods for all attributes.- Override the equals method.- implement the Comparable interface.- Override the toString methods to return a string which representsall object’s information.b- Implement the above class using java and NetBeans IDE.c- Create class called Test with main method to do the following:- Create ArrayList object.- Create the 4 objects of the above class, the information should readfrom input console.- Add the objects in the ArrayList object.- Display the information of all objects in the array list.
- a- Prepare a MS. Word document that contain a UML represent a class ofyour choice, the class should satisfy the following properties:- Consists at least three private attributes.- Two constructors one with no arguments and one with arguments.- Getter and setter methods for all attributes.- Override the equals method.- implement the Comparable interface.- Override the toString methods to return a string which representsall object’s information.b- Implement the above class using java and NetBeans IDE.c- Create class called Test with main method to do the following:- Create ArrayList object.- Create the 4 objects of the above class, the information should readfrom input console.- Add the objects in the ArrayList object.- Display the information of all objects in the array list. I want different class than before1. Modify the method beginsWithVowel. Use a different way to implement the method (try method indexOf() from the String class). 2. Modify the driver class to iteratively ask the user to enter a sentence, and then translate the sentence, until the user decides to quit the program. import java.util.Scanner;public class Translator { //instance variables //constructors //methods public static String translate(String sentence)// My name is Patrick Casseus { String result = ""; sentence = sentence.toLowerCase(); Scanner scan = new Scanner(sentence); while(scan.hasNext()) { result = result += translateWord(scan.next()) + " "; } return result; } private static String translateWord(String word) { String result = ""; if(startWithVowel(word)) result = word + "yay"; else if(startWithBlend(word)) // chair -> air + ch + ay result = word.substring(2) +…Dynamic Apex: Write test class for this apex code(Not required the output) You are working on the project in which you have to create the apex code in which your task is to define the objects dynamically by using the method argument which is api name in string and a map of string, string as a key value pair. Class Code: public static void modifySobjectData(String str , Map mapofString) { //Retrive the type of Sobject by using the getGlobalDescribe Schema.SobjectType targetType = Schema.getGlobalDescribe().get(str); //Initalize the Object Sobject newobject = targetType.newSobject(); for(String s :mapofString.keySet(O) { newobject.put(s, mapofString.get(s)); } System.debug('newObject' + newobject); //Perform the DML if(targetType != null) insert newobject; } }
- To implement an interface, a concrete class must implement AT LEAST ONE method heading.False.True.Challenge exercise The following object creation will result in the constructor of the Date class being called. Can you write the constructor’s header? new Date("March", 23, 1861) Try to give meaningful names to the parametersCreates a class Student with 3 attributes: name, id and level. a. Add a constructor able to create a Student; b. Add the methods getId and getLevel; c. Add the method display able to display the attributes,
- You need 5 java classes and these include Netflix Class (Parent class of Movie and TVShow class) Movie Class TVShow Class Test/TestDriver Class Database Class Please read the questions carefully. TestDriver is given for the other image.1. Create a Student class that implements the Person interface. As well as storing the students name and email, also store their course grade (e.g A, B, C) in a member variable. The grade should be accessible via a getGrade method. For the implementation of getDescription return a message along the lines of “A C grade student”, substituting the students actual grade.2. Create a Lecturer class that implements the Person interface. This class should also store the subject that the lecturer teaches. Add a getSubject method, and implement getDescription so that it returns a suitable message, e.g. “Teaches Biology”.3. Create a third class, Employee that implements the interface. This should also store the name of the department the Employee works in (available via getDepartment). Again, getDescription should return a suitable message.Urgent Quick Question Write an equals method for the StepsFitnessTracker class that tests whether the one object is equal to another object that is passed as an argument (Object otherObject). The Object superclass provides an equals method that tests if two object references are equal. Your new equals method should override the Object equals method, and should test the following: • Return true if the current (this) object, and otherObject are identical references (hint: you can use the == operator for this). • Returns false if otherObject is null. • Returns false if the current (this) object and otherObject have different classes (hint: you can use the getClass() method provided by the Object superclass, see the Java 8 API documentation for details). • Casts otherObject to a StepsFitnessTracker, and tests for equality of each instance variable1 , if the instance variables are the same the method should return true. Now write an equals method for the DistanceFitnessTracker and…