Which keyword is used to inherit a superclass into subclass? O a. extends O b. void O c. abstract O d. implements
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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:
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- When a method in a subclass overrides a method in superclass, it is still possible to call the overridden method using super keyword. If you write super.func() to call the function func(), it will call the method that was defined in the superclass. You are given a partially completed code in the editor. Modify the code so that the code prints the following text: Hello I am a motorcycle, I am a cycle with an engine. My ancestor is a cycle who is a vehicle with pedals. import java.util.*;import java.io.*; class BiCycle{String define_me(){return "a vehicle with pedals.";}} class MotorCycle extends BiCycle{String define_me(){return "a cycle with an engine.";}MotorCycle(){System.out.println("Hello I am a motorcycle, I am "+ define_me()); //////code hereString temp=define_me(); //Fix this line and code here/////code ends here System.out.println("My ancestor is a cycle who is "+ temp );}}class Solution{public static void main(String []args){MotorCycle M=new MotorCycle();}}JAVA programming languageWrite a Java program that implements the following classes: Show - name: String - timesWatched: int - rate: double - maxRate: int =5 + Show() + Show(name: String) + getName(): String + setName(name:String):void + getRate(): double + getTimesWatched(): int + getMaxRate(): int + updateRate(): void + toString(): String Movie Series - duration: int - productionYear: int + Movie() + Movie(name: String, duration: int, productionYear:int) + toString(): String + getDuration(): int + getProductionYear(): int - numOfEpisodes: int episodeDuration: int + Series() + Series(name: String, numOfEpisodes:int, episodeDuration: int) + toString():String + getNumOfEpisodes(): int + getEpisodeDuration(): int In the Show class: - The timesWatched and rate must be initialized to zero. - The no-arg constructor reads the name from the user. - The Show(name: String) constructor initializes the data field name with the value of the passed parameter пате. - The updateRate method reads the user rate and re-computes…
- Java Questions - (Has 2 Parts). Based on each code, which answer out of the choices "A,B,C,D,E" is correct. Each question has one correct answer. Thank you. Part 1 - 1. Which is the correct way for a subclass to inherit a superclass in Java? A. class subclass : superclassB. class subclass extends superclassC. class superclass : subclassD. class subclass imports superclassE. class subclass implements superclass Part 2 - 2. Given the following code, the output is __. class Base { public int x = 5; }class Derived extends Base { public int x = 6; }public class Sample { public static void main(String[] args) { int x = 7; Derived d1 = new Derived(); System.out.print(d1.x); }} A. 0B. 5C. 6D. 7E. Error messageThis is object oriented programmingCreate an interface named Playable that defines a method play requiring no return value. Play just displays the string “Play me.” Create a class named Instrument that implements playable that contains a private member name but does not implement the play of Playable. a. define setter and getter for name b. define a constructor that accepts a String name argument to be assigned to the name attribute of the class c. override equals of the object for this class d. override toString of an object for this class 3. Implement a concrete subclass of an instrument named Guitar. a. Create a constructor similar to the default constructor provided by the system. See to it that the superclass object is created. b. See to it that the abstract method is also implemented c. override equals of the object for this class d. override toString of the object for this class
- 10. Java automatically applies the method to an object referenced in a String expression to represent an object’s state. a. toString () b. abstract c. super() d. this() 11. The call in a class constructor invokes the superclass's constructor that has the corresponding argument list. a. tostring () b. abstract c. super() d. this() 12. The call to invokes the constructor for the current class whose parameter list matches the argument list. a. toString () b. abstract c. super() d. this() 13. If no constructors are defined for a class, the constructor for that class will be provided by default. a. private b. super c. public d. no-argument 14. What is a keyword to declare a subclass to a super class in Java? a. implements b. extends c. throws d. followsD: A 21. The method finalize automatically executes when the class object goes out ofI Scope. 22. A mutator method ofa class changes the values of the data members of the class. 23. In Java, the reference this is used to refer to only the methods. not the instance variables of a class.You have a method which requires an argument of type superclass. It will function if you supply a subclass object rather than a superclass object. Is it permissible? What is the purpose?
- O d. protected The access specifier which can be used to access variables from subclass of other package is O a. Private O b. Protected con O c. Default O d. No modifier General s page hpIn java ,A subclass constructor cannot catch exceptions thrown by its superclass constructor. Is this statement true or false? Write a code that demonstrates your claim.in java