grammer question

Question

When asking the definition of a countable noun,say,"laptop",which form is grammatically correct?

1-what is A LAPTOP?

2-what is Laptop?

(no doubt there are other ways of doing so)

Answer 1

a laptop از نظر گرامر درسته. چون قبل از اسم باید حرف تعریف گذاشت.

Answer 2

The first one, "What is a laptop" sounds more familiar to me.

Answer 3

Of course "a laptop" is correct.