Initial online applications, then online assessment (comprehension, numerical, logical), the online video interview (4 questions, 30 seconds to read the question, then 2 minutes to answer), the selection centre (in-person behavioural interview - starting off with basic "tell us about yourself" question, "what do you know about our company" question, then 3 or so behavioural questions on safety, teamwork, and adapting to a new workplace/style, and two different group discussions/presentations). Next will be site-based selection, possibly involving another interview, then reference checks and medicals.

They went to my University to speak about BHP Billiton and their graduates program. They interview me right away, after that I went for a phone interview for a specific position in the company and a final interview in the main offices. All this process took 4 months at least