A lot of people have been digging around the Lost Ark website and found some ten videos of the possible playable characters and advanced classes for the upcoming CBT. The game is supposed to have 18 playable classes with 3 starting characters, but the latest website shows that there is a new Bard class available. Not sure if this will be a starting job or an extension to a new job that wasn't available in the 10 classes that were leaked.

Source: Link
Game Site: http://lostark.co.kr/