The fourth chapter of the Khuddaka-Pátha (Khp.2).
It consists of ten questions which, according to the Commentaries (KhpA.76; ThagA.i.479), the Buddha asked the young Sopáka, then an arahant though only seven years old, with the idea of giving him the upasampadá-ordination.
The boy-arahant answered the questions and this conversation formed his ordination. (See also Thag.v.485; Ap.i.64f).
These questions were elaborated by the nun of Kajangalá (see A.v.54ff). (q.v.).
The Majjhima Commentary (MA.ii.636) on the Ambalatthika-Ráhulováda Sutta seems to indicate a set of questions called Kumárapańha in connection with Ráhula when he was seven years old.
See also SA.iii.99, where Buddhaghosa says that Cittagahapati, in a discussion with Nigantha Nátaputta, referred to the Kumárapańha.