thanks for replying.
I have already visited the page.
However still those topics are not clear to me.
It would be better if you could provide some code examples.....may be a real life scenario.
That article looks extremely comprehensive to me. And as far as I can see it does have examples to illustrate the concepts. I don't see the need for any more examples. Especially as it seems like you're just going to ask for more examples even if we do produce some.
So let's turn it over to you. You've read the article. And your knowledge is still incomplete. So why don't you ask a specific question about something which you don't understand yet? Better still, produce an example and ask a specific question about it.