How are the players chosen to Pre-Draft Camp

Question

and I hace other question, what is the maximum age for entering to draf

Answer 1

there is no age limit for the draft. Arvydas Sabonis (POR) became the oldest rookie at 31. One of the best passing big man ever.

Answer 2

Scouts from all the teams go to high schools and colleges and watch the games there to find good players. And I don't think there is a max. age. Just most teams would probably choose a 20 year old over a 30 year old in the draft because he has more time to grow and improve.