I applied in-person. The process took 1 day. I interviewed at US Army (Stuttgart) in Mar 2014
Interview
Very few times that interviews are required, unless you are seeking a specific position. When an interview is required, it is mostly based on qualifications, but can be "who you know" driven. The interview will normally start with a branch/career manager, before an interview with the unit you are seeking the job.
Interview questions [1]
Question 1
Questions were very specific about your experience, and how you could be a benefit in the position.