What is the subject and predicate in sentence- what your name?

This sentence is grammatically incorrect. It is missing a subject. Here's why:

* Subject: The subject is the person or thing performing the action. In this case, there's no clear indication of who is being asked about their name.

* Predicate: The predicate tells us what the subject is doing or being.

To correct the sentence, we need a subject:

* What is your name? (Subject: you, Predicate: is your name)

Now the sentence has a clear subject ("you") and a predicate ("is your name").