No it's not "The Last Question" nor is it "The Last Answer" so don't bother.
I don't remember the rest if the plot if there is one, but the main part of the short story is that enlightened aliens arrive on Earth and offer to answer humanity's questions. I'm almost certain it was aliens and not a deity. I don't remember if the number of questions was limited.
Paraphrased, the question humanity asks is:
What would be the best question for us to ask?
And the answer, also paraphrased, is:
The question they just asked.
Also I appologize if this is a duplicate, Google didn't return much relevant and I'm on mobile so SE doesn't provide potential duplicates as you type.