noun, noun or participle which takes 'suru', intransitive verb
question-and-answer format; answering each question in turn
Describes a format where questions are answered one by one, often in interviews, Q&A sessions, or drills. Can be used as a noun or with する to mean 'to conduct a Q&A' or 'to answer questions one by one'.
記者会見は一問一答形式で行われた。
The press conference was held in a question-and-answer format.
社長が記者の質問に一問一答した。
The president answered the reporters' questions one by one.