Looking on the internet deeply has found these results:

What do you do? is the most popular phrase on the web.

What are you doing ? 131,200,000 results on the web	What do you do? 1106,000,000 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
...with your name on them. What are you doing? It's game time. He's lying. What are you doing? to strike again. What are you doing? What are you doing? "What are you doing?" he shouted. Or your desires What are you doing?	So tell me, Jacob, what do you do? What do you do? What does a scientist do in that case? Seriously, what do you do? There is so much information; what do you do? Seriously, what do you do? You encounter it within minutes at a party, when you get asked that famous iconic question of the early 21st century, "What do you do?" And they're not the same What do you do? But if you are, and you say to somebody, you know, they say, "What do you do?"

What are you doing ?

131,200,000 results on the web

What do you do?

1106,000,000 results on the web

More popular!

So tell me, Jacob, what do you do?
What do you do? What does a scientist do in that case?
Seriously, what do you do?
There is so much information; what do you do?
Seriously, what do you do?
You encounter it within minutes at a party, when you get asked that famous iconic question of the early 21st century, "What do you do?"
And they're not the same What do you do?
But if you are, and you say to somebody, you know, they say, "What do you do?"