Which of the following is true about Interface?Select one:O a. It is use to model multiple inheritance which allows a class to have more than one superclass.O b. It is a special kind of block containing method signatures onlyIt defines a standard and public way of specifying the behavior of classesO c.O d. All of theseO e. It defines the signatures of a set of methods without the bodyWhich of the following method is allowed to be overriden?Select one:O a. public static void setName0{}O b. public no_override void setName(}O . public final void setName(0{}O d. public void setName(0{}e. None of these

Answer:- d. All of these Explanation:- Interfaces has following property in java:- It is used to…

Which of the following is true about Interface? Select one: O a. It is use to model multiple inheritance which allows a class to have more than one superclass. O b. It is a special kind of block containing method signatures only O. It defines a standard and public way of specifying the behavior of classes O d. All of these Oe. It defines the signatures of a set of methods without the body

Which of the following is true about Interface? Select one: O a. It is use to model multiple inheritance which allows a class to have more than one superclass. O b. It is a special kind of block containing method signatures only O. It defines a standard and public way of specifying the behavior of classes O d. All of these Oe. It defines the signatures of a set of methods without the body

Microsoft Visual C#

7th Edition

ISBN:9781337102100

Author:Joyce, Farrell.

Publisher:Joyce, Farrell.

Chapter10: Introduction To Inheritance

Section: Chapter Questions

Problem 20RQ

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Design a console program that will print details of prescribed textbooks of students. Make use of an abstract class Book with variables that will store the author, title, category and price of a book. Create a constructor that accepts the author, title and category through parameters and assign these to the class variables. Create an abstract set method for the price of a book; also create get methods for the variables.Create a subclass TextBook that extends the Book class and implements an iPrintable interface. The interface that must be added is shown below:public interface iPrintable { String DisplayDetails();}The TextBook subclass has a private variable named yearPrescribed for which a get method must be written. The constructor of the TextBook class must accept the author, title, category and yearPrescribed through parameters. Write the code for the setPrice() and DisplayDetails() methods.Write a useBook class and instantiate 2 objects of the TextBook class.
True or False a. If you do not write a constructor for a class, java will supply a default constructor. b. Java does not allow constructors to be overloaded. Abstract methods must have a void return type. d. All classes have a default equals (Object) method even if their programmer didn't write one for it. You can override a static method defined in a superclass. A method can have at most one return statement. g. A method cannot return a Wrapper class reference. h. The reserved word super can be used to access a constructor in a parent class. i. Object is an abstract class. e. f.
Define a java Name class with attributes: String firstname, middle name, lastname. Include the following methods: - A constructor with 3 parameters. Initialize the 3 member variables to the parameters being passed. Also, include the default constructor. - getter and setter methods for all attributes - override toString method Define a class called DebitCard. A debit card has a card number, Name and balance. a) Include a constructor with 3 parameters. Initialize the 3 member variables to the parameters being passed. Also, include the default constructor. b) Include getters/setters for all attributes. c) Add the following member functions: float inquireBalance() float depositCash(float amount) //increases the balance with amount boolean withdrawCash(float amount) // returns true if sufficient amount is available for withdrawal and decreases the balance by amount float interest(float rate) //calculates the interest rate incurred. Assume the parameter rate is considered as…
Define a java Name class with attributes: String firstname, middle name, lastname. Include the following methods: - A constructor with 3 parameters. Initialize the 3 member variables to the parameters being passed. Also, include the default constructor. - getter and setter methods for all attributes - override toString method Define a class called DebitCard. A debit card has a card number, Name and balance. a) Include a constructor with 3 parameters. Initialize the 3 member variables to the parameters being passed. Also, include the default constructor. b) Include getters/setters for all attributes. c) Add the following member functions: float inquireBalance() float depositCash(float amount) //increases the balance with amount boolean withdrawCash(float amount) // returns true if sufficient amount is available for withdrawal and decreases the balance by amount float interest(float rate) //calculates the interest rate incurred. Assume the parameter rate is considered as…
Which of the following statements is TRUE about abstract classes in Java? A. An abstract class implementing an interface does not have to implement methods of the interface. B. An abstract class extending another abstract class does not have to define methods of the super abstract class. C. The first subclass of an abstract class should define all the abstract methods inherited from all the interfaces and super abstract classes. D. All the above E. None of the above
1 - Student class Make a class student (in student.py) that stores the following information for a student: Name (name) Student number (student_nr) Points per assignment (points_per_assignment) Exam grade (exam_grade) a) Behind each point of information is the name of the parameter to the initializer method. Store this information from the parameters in the object attributes with the same name. b) Add a method course_points() which returns the number of course points the student has gotten. Example: mary = Student("Mary", 15789613, [10, 9, 8, 10, 9, 10], 9)print(mary.course_points()) > 121 The calculation of the course points is explained in the course overview, course setup slides (Links to an external site.) and the first lectureLinks to an external site.. c) Add a method grade() which returns a the final grade of the student, rounded to nearest half (upwards, 6.75 -> 7). As per regulations, a 5.5 becomes a 6. If the student did not pass both the assignments (>= 95…
What is the design pattern depicted in the diagram below? The intent of this design pattern is to define an interface for creating an object, but let subclasses decide which class to instantiate. It lets a class defer instantiation to subclasses. Client Abstraction normalMethodoe BmakeObjecto Product do some stuff aProduct = makeObjecto: f do some more stuff -aProduct Product ConcreteOne ConcreteTwo makeObjecto : Product ProductOne ProductTwo return new ProductOneo. A. Factory Method Design Pattern B. Singleton Design Pattern C. Proxy Design Pattern D. Adapter Design Pattern
QUESTION 16 What must be true of a class with one abstract method? O The class must also implement the Iterable interface Any derived class must implement the method The abstract method must have the static modifier O The method cannot specify a return value QUESTION 17 Suppose we wanted to design a set of classes for a veterinarian's office. Our Customer class looks like this: public class Customer { Pet [] pets; } Select all the statements that are true Once the size of the pets array has been set, it cannot be changed Because we're using an array, all pets must be the same A customer must have at least one pet We also need to declare a Pet class QUESTION 18 What is the proper use of an enumeration? To define a set of ordered values To enforce the use of the Comparable interface O To define, or enumerate, the values returned by a Random object generator O To define the classes in an inheritance hierarchy
Create a class Animal and Add a protected data member named id of integer type. Add get/set methods for id data member in Animal class with public access. Also provide default constructor this should initialize id to 0. Also provide parameterized constructor and toString method. Add an abstract method tellAboutSelf method to Animal class with public access Add another abstract method speak method to Animal class. Reptile, Bird, Mammal Next create the three child classes which extends form Animal class. Add a default constructor to each of the above created class. The constructor should initialize the id data member id, Reptile, Bird and Mammal, to 1, 2 and 3 respectively also it display a message “(class Name)’s default constructor”. E.g. for Bird it says “Bird’s default constructor”. Add a parameterized constructor to each of the above created class. The constructor should initialize the id data member, Reptile, Bird and Mammal, to the specified id passed to the constructor also it…
i. Interface to Interface inheritance is possible. ii. Interfaces have only abstract methods. iii. Interface to Interface inheritance is not possible. iv. Interfaces can not be used for the purpose of multi inheritance. v. For the purpose of multi inheritance more than one Class can be used. Which of the above information(s) is/are wrong? Lütfen birini seçin: a. i-iv-v b. None c. ii-iv d. All e. i-ii-iii
Create a class BeautyProduct with name, color, brand. Provide Constructors, getters, setters and also write toString method. Now create a class Lipstick which extends the class BeautyProduct as Lipstick is-a Beauty Product it has totalVolume, remainingVolume, price, texture (gloss, matt) as private data members. Provide Constructors, getters, setters and an apply() method whenever this method is called a beauty item is applied and its volume decreases by 10.This should also check that volume must not be zero if it then u have to throw exception. Also write toString method which prints all details like name, color, brand, price, texture and volume. Create another class foundation having totalVolume, remainingVolume, price, texture (liquid, cake) and lastingTime (number of hours foundation remain intact on face and does not crease) as private data members. This also extends the base class i.e. BeautyProduct. Provide Constructors, getters, setters and an apply() method whenever this…
Which of the following is true of abstract classes? a.An abstract class cannot have child classes b.An abstract class is a parent class with more than one child class. c.An abstract class cannot be instantiated. d.An abstract class is another name for a base class. Which of the following is true of abstract methods? Select one: a.An abstract method is a method of the child class which overrides a parent method. b.An abstract method is a method without a body which is declared using the keyword abstract. c.An abstract method is any method of an abstract class d.An abstract method is a method which cannot be inherited. Can an abstract class define both abstract and non abstract methods. a.No. All methods must be one or the other. b.No. All methods must be abstract. c.Yes, but the child classes do not inherit the abstract methods. d.Yes. The child classes inherit both.