Where does James Joyce use stream of consciousness in the "Dubliners" stories?
While it some years since I have read Dubliners in full, I don't recall any passages that could be regarded as stream of consciousness narration. For the most part the stories are told in a fairly conventional, linear narrative style. At some points we are taken more inside a character's head than usual - the boy's ultimate despair and self-criticism in Araby, or Gabriel's self-revelation in The Dead, for example - but even here I would regard the narration as conventional rather than stream of consciousness.
I don't think there is any Stream of consciousness in Dubliners. Dubliners in the reign of Epiphanies, whereas Ulysses is that of the Stream of consciousness.
Actually, I think, there is no manifestation of the complete technique in Dubliners but we can have a preview of his later novels.
So, in Araby, we see the world from the point of view (or within the mind) of the boy. Instead of looking at the story from a camera above, we see the world from the boy's eyes. And, also, we have to guess what's left out of the narration; we don't have the full picture but parts of it, as long as, that is, they are perceived by the boy himself.