if you are asking about someone's father's job

No as Grammar Geek told you. It is wrong, if you are asking about someone's father's job,you can use the following alternatives.

1. What does your father do?

2. What is your father's job?

3. How does your father make a living?

4. how does your father pay the bills?

5. What does your father work?

6. what is your father's profession/occupation?

7. and many other alternatives but not what is your father?

Reference

What Is Your Father