Which year are you in

Which year are you in
 

Hi,

At college/uni, if a student wants to get an answer from another student like these:

-I am a year one/two/three/four.
-This is my first/second/third/fourth year.

How should he phrase the question? Is it natural English to say?:

-Which year are you in?

That works.

This also works:
What year are you?

Thank you, Rusty.

In the first post, I made these up:

-I am a year one/two/three/four.
-This is my first/second/third/fourth year.

Are they natural English?

The second of your made-up sentences is natural sounding.
The first one needs 'student' added at the end to get closer to natural, but more natural would be "I'm a first-year student.".

Thank you, Rusty.