When I interviewed for my ED position I was given a triage scenario - 4 patients, their symptoms, VS etc. Who would I send through first, what order. One was chest pain with a normal EKG, a woman with what I thought could be sepsis, and I forget the rest.
I decided the sepsis was the priority (think code sepsis, where you have to have cultures drawn and antibiotics in within a certain time frame). But then I had my hypothetical tech bring in the chest pain for monitoring, troponin etc. at the same time.
However, if you haven't worked in the ED before (I had), they may not expect you to know all that.