Note: I have edited the question substantially as I was unclear about the question I was asking. It is mostly my own fault for not posing the question better, but I hope that it is more clear now, and I will be able to get some more relevant answers. Thanks to everyone for your answers even if they were off topic for my intended question.
To let some one know that I'd like to ask them a question, I might say:
I've got a question for you.
What is the point of having the word "got" in this sentence? It seems redundant with the contracted word "have". They both add the same meaning to the sentence.