a final ending indicating a question or a guess, attached to a verb
오늘부장님도 오시는가요? ― Oneul bujang-nim-do osi-neun'gayo? ― Is the manager coming today as well?
방학동안에도 학교에 학생이 많이 있는가요? ― Banghak dong'an-e-do hakgyo-e haksaeng-i mani in-neun'gayo? ― Are there many students in the school during the vacation, too?