제 質問은 對答됐어요.
대답하다 - to answer
대답되다 - to "get" answered (for lack of a better word to indicate present tense-ness)
대답됐다 - to be answered (means was answered in the past)
-되다 verbs are often passive forms of the corresponding -하다 verb.
It should be 제 질문이 대답됐어요
Both are fine, it will depend on the context (which is lacking here).