A question asked of someone either in identical or varied form by that same person or persons.
It typically cannot be answered since it would have previously been answered.
Therefore, the expectation of that person or persons being questioned is that they need not be expected to respond to it (wastes time and useful energy).
The questioning tends to be done somewhat annoyingly to add emphasis to an initial query. However, the net result is more like an annoying interrogation.
See also: retorical