"Which department do you work in?"

Translation: Hvilken avdeling arbeider du i?

[BrettRyland]

Can the "i" be placed at the beginning of the sentence? I.e. "I hvilken avdeling jobber du?"

[Stigjohan]

Yes. In that case it feels somewhat natural to stress "du". "I hvilken avdeling jobber du?" (As opposed to Henrik, whom I just asked).