My PhD viva session was on June 1st, 2016. Alhamdulillah the session was smooth, attended by 5 Professors, 3  internal examiners and 2 external examiners. The rules here in Korea are quite special, where as a student, before the presentation, student should prepare snacks, drinks and even stationary like pen and pencils for all the examiners. Other than that, a copy of the presentation slides, and other related ‘research stuffs’.