German A1 Level Question

The correct translation of 'Do you have a question?' is 'Hast du eine Frage?'. 'Bist du eine Frage?' means 'Are you a question?', 'Sind Sie eine Frage?' means 'Are you a question?' (formal), and 'Hat es eine Frage?' means 'Does it have a question?', which are incorrect in this context.