Relatedly, in an inverted question like "La fille a-t-elle un chat ?" , is the placement of the subject at the beginning done solely for emphasis? If so, would it be uncommon for a comma to appear after it?
[Edit] As usual, I found the answer after posting the question...
Apparently, when the subject is a noun or name, that subject remains in place and is repeated in the form of a subject pronoun.