Please answer all of the following questions. Urgent please (a) What is Polymorp

Question

Please answer all of the following questions. Urgent please

(a)    What is Polymorphism? How is Polymorphism used in Java? Give an example to describe your answers.

(b)   Which highest level class contains toString method?

(c)    What is the purpose of overriding toString method in a class?

(d)   What is a bytecode? When is a bytecode created? Why does Java create bytecodes?

(e)   Is Java an interpreted language or a compiling language? Explain your reasons.

(f)     What is a CheckedException? Give one example of CheckedException.

(g)    What is an abstract class? Why is abstract class created? How to create an abstract class in Java?

(h)   What is Inheritance? Why is it used in OOP? How is it used in Java?

(i)      What are the differences between static binding and dynamic binding?

(j)     What can we put into a Java class? What are the good things about that?

Explanation / Answer

The word 'polymorphism' literally means 'a state of having many shapes' or 'the capacity to take on different forms'. When applied to object oriented programming languages like Java, it describes a language's ability to process objects of various types and classes through a single, uniform interface.

Polymorphism is the capability of a method to do different things based on the object that it is acting upon. In other words, polymorphism allows you define one interface and have multiple implementations

Eg :

Polymorphism can be demonstrated with a minor modification to the Bicycle class. For example, a printDescription method could be added to the class that displays all the data currently stored in an instance.

public void printDescription(){

    System.out.println(" Bike is " + "in gear " + this.gear

        + " with a cadence of " + this.cadence +

        " and travelling at a speed of " + this.speed + ". ");

}

The toString method is widely implemented. It provides a simple, convenient mechanism for debugging classes during development. It's also widely used for logging, and for passing informative error messages to Exception constructors and assertions. When used in these informal ways, the exact format of toString is not part of the contract of the method, and callers should not rely on the exact format of the returned String

The default toString() method in Object prints

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