At first the exam takes place in one of the villages

then the candidates stand in the battle arena then the battle starts by two on two each of them have their own techniques that only they and their master knows and after the end of the fight the candidates are chosen they are chosen based on their styles and weapon. Like:

Minato taught me some powerful styles and

they are: blood demon style,

saint of 105 styles,

sage of 100 years,

god of thunder style,

palm of nirvana,

thunder Blood emperor rises,