How to get chuunin in Naruto arena?

You must be recommended by your sensei and have to have completed at least 20 missions I believe. Then you have to take a series of exams. In Naruto, he must take a test to see how well you can cheat, then he had to survive the Forest of Death and retrieve two scrolls, then there were preliminary fights, then the actual third round tournament. Chunin status was determined by the Hokage and the proctors.