It is not true that they have preference over STEM students.

I was an Arts local undergrad back then and was grateful to be given a shot (I think it was round2?)

Round 1 was the test.
Round 2 was the interview.

Unsure if there is a round 3, though. Felt I was very close to getting in and also had the luck of a IO there who for some reason wished me luck! Too bad I was so nervy then that I fked up my interview.

But oh wells