どこで働いてるの？

where; what place; how much (long, far); what extent

indicates location of action; at; in; indicates time of action; indicates means of action; cause of effect; by; and then; so; indicates continuing action; indicates certainty, emphasis, etc.

to work; to labor; to labour; to function; to operate; to be effective; to work (i.e. ... works); to come into play; to commit (e.g. a crime); to perpetrate; to do; to act; to practise; to practice; to be conjugated

indicates possessive; nominalizes verbs and adjectives; substitutes for "ga" in subordinate phrases; (at sentence-end, falling tone) indicates a confident conclusion; (at sentence-end) indicates emotional emphasis; (at sentence-end, rising tone) indicates question