06-02-25
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Q)What is binding in the context of a method?
=>Associating/linking a method call with method definition is nothig but
binding.
=>binding is of two types.
               1)static binding
	       2)dynamic binding
Q)What is static binding?
   =>Associating the method call with the method definition if happens at
   compile time, it is known as compile time binding or early binding or static binding.

   Note:- When method overloading is implemented, static binding only is perfromed.

Q)What is dynamic binding?
=>Associating the method call with the method definition if happens at
   program's execution time, it is known as dynamic/runtime/late binding.

=>JVM perfroms dynamic binding.

=>3 conditions must be satisfied for dynamic binding to happen.
           1)method overring to be implemented
	   2)super reference should reference the sub class object
	   3)method call should be made using super reference

Q)What are the similarities between method overloading and method overriding?
 =>In both the cases method name is the same.
 =>Both participate in the implementation of polymorphism

Q)What are the differences between method overloading and method overriding?
   Method Overloading                        Method overrriding
   ----------------------------------------------------------------------
   1)method signatures                       same
   are different

   2)  return type is                 return type of the methods 
        insignificant                           should be the same
   
   3)access modifier                     plays a role               
   doesn't paly any role
   in method overloading

   4)implements static              participates in the implementation
   polymorphism                       of dynamic polymorphism
   **********************************************
   Q)How to create "has-a" relation between two classes?
       =>by making the reference of one class as an instance variable in another class,
       has-a relationship is created.

   Q)How to create "use-a" relation between two classes?
      By making the reference of some class as parameter of
      the method another class use-a relation is created.
   For eg.
   class Car extends Vehicle{
       Gear gear;//has-a relation
       void move(Fuel fuel){  //use-a relation
       }
}