What would you mostly use an interrogative noun?

You're right, "interrogative noun" isn't a standard grammatical term. We use interrogative pronouns to ask questions. Here's a breakdown:

* Interrogative Pronouns: These are words that introduce questions and stand in for the unknown information we're trying to find. They are used to ask about:

* People: *Who* is coming to the party?

* Things: *What* did you buy at the store?

* Possession: *Whose* book is this?

* Which: *Which* one do you want?

* Interrogative Adjectives: These words modify nouns to ask questions about specific qualities or characteristics:

* What kind of music do you like?

* Which color is your favorite?

* Whose car is that?

Let me know if you have any other grammar questions!