It was very easy and simple they ask questions about your experience in ABA and why you want to work with children. They ask about your background such as school and major.

not that hard, pretty simple. 15-30min video interview and on-boarding process started. on-boarding process was little long though. it took me about 2weeks to complete all the process. if you are new to this field i think interview could be more long and be asked more questions. but if you are already RBT and have some experiences than it's not hard.