one question
Counts a single question in a test, quiz, interview, or similar setting. Often used with counters or in phrases like 一問一答.
The exam has ten questions in total. The first question is easy.
Let's proceed in a question-and-answer format.
I barely managed to solve one question within the time limit.
This test is worth five points per question.
He calmly answered the next question.
質問 is the general word for 'a question' in any context, while 一問 specifically counts a single question as one unit, as in a quiz or exam.
question-and-answer format; answering each question in turn
Compound of 一 (one) and 問 (question, problem). The reading いちもん follows standard on'yomi.