Skip to main content

Q) More about Polymorphism?




A)
->it is used not only doing one task . it can do more than one task is called extensibility.
->poly means many, so polymorphism means many forms.
->so with single message . we can call more than one task in the polymorphism.
->same entity behaving differently indifferent situations is called polymorphism.
->making method call is message passing.
->object is behaving means that method is under execution.

 

->message is same but context is different, for the same interface the object behave differently i.e. object polymorphism.
->here x is not polymorphism. The object is polymorphic based on the message.
->in procedure oriented 100 names doing 100 tasks but in object oriented 1 interface doing 100 tasks.
->message is nothing but a method call from the outside of the object , i.e. an interface between that object and that outside world.

Comments

Post a Comment

Popular posts from this blog

Q) What is JDBC driver? What is its role in java database connection?

A) ->A translation software written in java according o JDBC specification is nothing but “JDBC driver”. -> JDBC driver implements JDBC API. Use single API. JDBC driver role: They are 4 roles   1)       Establishing connection between JDBC client and database server. 2)       Receiving JDBC method calls made by JDBC client while performing database (CRUD) operations. 3)       Translating java method calls into DBMS understandable calls and forwarding them to database server. 4)       Receiving the results from database server. Translating them into java format and handling over the same to the JDBC client.
Post a Comment
Read more

Q) What is ODBC?

A) ->open database connectivity is a technology from MS that enables any language program (other than java) to communication with database Management System. ->in java program ODBC is directly not allowed for the fallowing reasons 1) OS dependency 2) Procedural oriented approach 3) Security thread
Post a Comment
Read more

Q) Explain about nested classes?

A) ->defining a class with in another class is known as nesting of the class. Ex: class A {        class B        {                      } //nested class, and inner class.because it is not static class. } //enclosing class or outer class. ->static class is declared in inside an another class then it does not become an inner class. Note: non-static nested class is known as “inner class”. In the above example class B is nested but not an inner class. Ex: class D {        static c        {                      } //nested class, but not an inner class , because of static class. } //outer class. ->we have three different kinds of inner classes. 1) Member inner class 2) Meth...
Post a Comment
Read more