Particle , can be also an interjection with the meaning "and" or "but"
yes; sometimes used to amplify what was said (without "yes" meaning)
Ты всё поняла́? - Да.
ty fsyo pa-nee-la? - da
Did you understand everything? - Yes.
Да нет же, всё совсе́м не так!
da nyet zhe, fsyo saf-syém nye tak
But no, it's not like that at all!