What is polymorphism in Java
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What is polymorphism in Java?
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It is when a
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It is when a single variable is used with several different types of related objects at different places in a program.
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It is when a single parent class has many child classes.
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It is when a class has several methods with the same name but different parameter types.
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- In Java, which of the following is false? An abstract class may implement an interface. A class that contains an abstract method must be declared abstract itself or a compiler message will result. A class may implement multiple interfaces. A class that extends another class may implement only one interface.In java programming (object oriented programming in general) Is it worth investing additional work and additional code to prevent highly coupled classes? Why or why not? Include references to back your ideas if possibleWrite a java program Write a class named Employee with name and salary as private data fields. Add a constructor with both parameters. Write a class named Manager which unherits the Employee class. Add an instance variable, named department, of type String and 15 private. Add a constructor in the subclass class and a toString () method that prints the manager's name, department, and salary [Hint: Add a tastanel) method in the super class as well]. Create objects of Manager and Employee dass
- Why is it necessary to devote more time and effort into Java programming (and object-oriented programming in general) to avoid having classes that are tied together when they do not need to be? Which three factors are more significant?This way, any class that implements the Visible interface can define its own behavior for making an object visible or invisible based on its specific requirements.Create a Priority Java interface with two methods: setPriority and getPriority. The interface should define a method for assigning numerical priority to a group of objects. Create a class named Task that represents a task (such as one on a to-do list) that implements the Priority interface. Make a driver class to test certain Task objects.java programming A is a parent class whereas B and C are subclasses of A. Now, B and Cshare some common attributes and some common methods, but there are somemethods in B and C that have very different implementations. Explain with reason whatA is going to be - a concrete class or an abstract class or an interface.
- Explore the concept of multiple interfaces in a class. How can a class implement multiple interfaces, and what are the benefits of doing so?(JAVA)In object-oriented programming, what is the benefit of composition? Group of answer choices 1. It is what allows us to call methods from inside other methods. 2. It is what allows us to have a method call itself. 3. All of the options are correct. 4. We can reuse common code from one or more classes by pushing that code into a class that those classes all instantiate. 5. It lets us write one method as one method action upon another.In java, can a polymorphic reference invoke a method that is only declared at the object's class level? If "yes", explain how.
- Compared to abstract classes, what are the benefits of using interfaces instead?Implement using Java Create an interface that shall have 2 methods and one string type attribute, also create an implementation class of the interface that shall define both methods (you can print YOUR favorite quote in each method body).Write a java program to define a class, describe its constructor, overload the constructors and instantiate its object.