UESTION 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
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A: The problem is based on the concepts of OOPS. NOTE: Three parts are answered according to the…
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A: Ans.) Option B i.e. Unreachable. Expalanation:- When the inheritance is private, the private…
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A: type cast is process of converting one type into another type. It could be implicit or explicit
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A: The below program is about declaration of an interface named Employee with the methods named sALARY…
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A: The answer of this question is as follows:
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Q: If all the classes used parameterized constructors and no default constructor then _________ i The…
A: Correct option: ii
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A: A) interface classes
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A: Here is the solution :
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A: Required:
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A: Correct option is a iii iv v are wrongly stated. The explanation is give below.
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A: Given:
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A: Answer: While implementing an interface, we need to implement all the methods declared in the…
Q: Q10: Selct a false statement about abstract classes. a. An abstract class cannot be instantiated…
A: False Statement from the above abstract class
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A: Abstract Classes are the classes that contain 0 or more abstract methods
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A: Disclaimer : Answering only for the first one : We cannot have a constructor within an interface in…
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A: Explanation: When the inheritance is private, the private methods in the base class are…
Q: QUESTION 5 All methods in an abstract class must also be declared abstract. O True False
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A: public class Customer { //declaring variables private String name; private String address;…
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A: Answer is given below.
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A: Answer :- The correct statement is If a derived class does not provide its own version of virtual…
Q: Write an abstract class, it can be anything well defined from the very basics.
A:
Q: Which of the given modifiers is used when an abstract method is implemented by a derived class? a.…
A: Answer to the above question is in step2.
Q: If a class inheriting an abstract class does not define all of its functions then it is known as?…
A: HELLO THEREI AM ADDING ANSWER BELOW PLEASE GO THROUGH IT THANK YOU
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:
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- public class date { private int day; // from 1 to 31 private int month; // from 1 to 12 private int year; // from 2000 upwards public void advance (); // move to next day }; Implement a constructor that initializes new objects of date class to be set to the 1st of January 2000. Implement setters for day, month, and year. Implement the advance method, which moves to the next day, ensuring that all data members are updated appropriately.Design a new Triangle class that extends the abstract GeometricObject class: Draw the UML diagram for the classes Triangle and GeometricObject Implement the Triangle class Write a test program that prompts the user to enter three sides of the triangle, a color, and a Boolean value to indicate whether the triangle is filled: The program should create a Triangle object with these sides and set the color and filled properties using the input The program should display the area, perimeter, color, and true or false to indicate whether it is filled or notVehicle is an abstract class. Create the Airplane class as a subclass of Vehicle. Extend and override Airplane as necessary to meet the criteria below. The travel method should return the distance traveled by the Airplane object. CODE: abstract class Vehicle { public abstract double travel(double time);} //add class definitions below this line //add class definitions above this line public class Exercise2 { public static void main(String[] args) { //add code below this line //add code above this line }}
- java programming Robot Class : a robot has a name , located at a point with integer coordinates , faces north , east , south , or west and keeps a record of all its movements positions . The class has the following methods : A default constructor that initializes robot's name to " Unknown ” , location to ( 0,0 ) , direction to North , and travelled distance to 0 , and simulated movements to null . A constructor that given robot's name , starting location , and facing direction , Accessor methods to access all the instance variables and the simulated movements of the robot Mutator methods that change the instance variables to given values and they made the change for only suitable values . tumLeft and turn Right methods that change the direction of the robot but not the location move method that moves the robot by one unit in the direction it is facing . get Travelled Distance method that retums how many units has the robot moved .When a concrete class inherits from an abstract class, you have to implement all abstract methods declared in the super class before you can instantiate it (the concrete class). True False1 - 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…
- 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…3. Person and Customer Classes The Person and Customer Classes Write a class named Person with data attributes for a person’s name, address, and telephone number. Next, write a class named Customer that is a subclass of the Person class. The Customer class should have a data attribute for a customer number, and a Boolean data attribute indicating whether the customer wishes to be on a mailing list. Demonstrate an instance of the Customer class in a simple program.Software Requirements: • Latest version of NetBeans IDE • Java Development Kit (JDK) 8 Procedure: 1. our progras from rhFactor non-static and private. Remove the constructor with two (2) parameters. 2o upply uncapsutation Make bloodType and 2. The names of the public setter and getter methods should be: • setBloodType() • setRhFactor() getBlood Type() getRhFactor() 3. Use the setter methods to accept user input. 4. Display the values by calling the getter methods. Sample Output: Enter blood type of patient: Enter the Rhesus factor (+ or -): O+ is added to the blood bank. Enter blood type of patient: B Enter the Rhesus factor (+ or -): B- is added to the blood bank.
- PROGRAMMING LANGUAGE: JAVA SUBJECT: ADVANCED OOP WITH JAVA QUESTION NO 1: Make an abstract class named A1 with 2 abstract methods, then implement those methods in child class.Person and Customer Classes Write a class named (Person) with data attributes for a person’s name, address, and telephone number. Provide accessors/getters and mutators/setters for each attribute. Write a displayPerson() to print out the attributes of the Person. Next, write a class named (Customer) that is a subclass of the (Person) class. The (Customer) class should have a data attribute for a customer number, and a Boolean data attribute indicating whether the customer wishes to be on a mailing list. Provide accessors/getters and mutators/setters for each attribute. Write a display customer() to print out the attributes of the Customer. Demonstrate an instance of the (Customer) class in a simple program.Create abstract class Pet , which is the abstract superclass of all animals. Declare a integer attribute called legs, which records the number of legs for this animal. Define a constructor that initializes the legs attribute. Declare an abstract method eat. Declare a concrete method walk that prints out something about how the animals walks (include the number of legs). Create the Dog class. The Dog class extends the Pet class. This class must include a String attribute to store the name and food of the pet Define a default constructor that calls the superclass constructor to specify that all dogs have 4 legs and name. override the eat and walk method. Create the Cat class that extends Pet. This class must include a String attribute to store the name of the pet, and a string to save food . Define a constructor that takes one String parameter that specifies the cat's name and food. This constructor must also call the superclass constructor to specify that all cats have four legs.…