Will the following code compile? If not what’s wrong with it? [10] package pack1; public class A { A() {} } package pack2; import pack1.A; class B { A a = new A(); }
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7. Will the following code compile? If not what’s wrong with it? [10]
package pack1;
public class A {
A() {}
}
package pack2;
import pack1.A;
class B {
A a = new A();
}
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- Q:-Write a statement in ClassA to check out the accessibility of your variable. package package_02; public class ClassB { public int x = 1; int y = 2; private int z =3; } package package_01; import package_02.ClassB; public class ClassA { public static void main(String[] args) { ClassB cb = new ClassB(); // System.out.print(cb.x); /* 1 */ // System.out.print(cb.y); /* 2 */ // System.out.print(cb.z); /* 3 */ } }In Java, Write a line of code that performs each of the following tasks : (a) Call superclass Employee's toString method from subclass Pieceworker's toString method. (b)Specify that class Pieceworker inherits from class Employee. (c) Call superclass Employee's constructor from subclass Pieceworker's constructor - assume that the superclass constructor receives three strings representing the first name, last name and social security number.Java- Suppose that Vehicle is a class and Car is a new class that extends Vehicle. Write a description of which kind of assignments are permitted between Car and Vehicle variables.
- 5. How many parameters must be passed if only the following prototype is given to a constructor? Prototype: className(int x, int y, int z=0); a) 1 b) 2 c) 3 d) Compile time errorI need to know how to do this in python: The base class Pet has attributes name and age. The derived class Dog inherits attributes from the base class Pet class and includes a breed attribute. Complete the program to: Create a generic pet, and print the pet's information using print_info(). Create a Dog pet, use print_info() to print the dog's information, and add a statement to print the dog's breed attribute. Ex: If the input is: Dobby 2 Kreacher 3 German Schnauzer the output is: Pet Information: Name: Dobby Age: 2 Pet Information: Name: Kreacher Age: 3 Breed: German SchnauzerReuse your Car class . In a main, build an object of that class, and print out the object using System.out.println(). Notice that this simply reports the memory address of the object in question, and we’d like to do something more useful. To replace (or override) the toString (or equals) function. Now, build a toString function that prints out the make, model, and odometer reading for a vehicle object. public class Car { //instance variables private int odometer; private String make; private String model; //overloading //constructors public Car(int odometer,String make, String model) { this.odometer = odometer; this.make = make; this.model = model; } public Car(String make, String model) { this.make = make; this.model = model; } public Car(String make) { this.make = make; } /* *getter & setter methods */ public int getOdometer() { return odometer; } public void…
- In c#, a class can inherit directly from multiple classes? A.) True B.) FalseWhat is the concept of binding? Differentiate between early binding and late binding. (Write in maximum 5 lines) Write a Java operator/keyword, which can be used to check the validity of reference before attempting down-casting from superclass object to subclass reference. Given an example of it usage. (Write in maximum 5 lines)Java- Suppose you write a new constructor for an extended class. Describe two different ways that the superclass's instance variables could be initialized within the constructor for the extended class.
- Q1. Create an User Defined Package in JAVA to define a method called SIZE() which will return thesize of the passed string. Create DriverClass to call the method of that package.What is the concept of binding? Differentiate between early binding and late binding. (Write in maximum 5 lines) Write a Java operator/keyword, which can be used to check the validity of reference before attempting down-casting from superclass object to subclass reference. Given an example of it usage. (Write in maximum 5 lines) Assume you have a method expecting the superclass's object to be passed as an argument. In this case, if you give it an object of subclass rather than superclass. Is it acceptable? Why or why not? (Write in maximum 5 lines) Which of the following assignments in FruitDriver class are valid or invalid. Give a reason for each. class Fruit {} class Apple extends Fruit {} class Orange extends Fruit {} public class FruitDriver { public static void main(String[] args) { Fruit f= new Fruit(); Orange o= new Orange(); Apple a= new Apple(); o=f; //a f=o; //b a=o; //c o=a;…Assume that you write a class Student that does not have a declared superclass. You do not write a toString method. Consider the following lines of code:Student st = new Student();String s = st.toString();Will these lines compile? If so, what exactly will happen when you try to execute?