The interview process is mostly to determine if you qualify to be a Soldier. As long as you can get a minimal score on a test called the ASVAB, then you can qualify. Other requirements are to not have any felonies or charges that do not meet minimal standards.
I applied in-person. The process took 1 day. I interviewed at US Army (Little Rock, AR)
Interview
An oral interview in person conducted by a panel of senior officers with questions that were designed to gauge character and integrity. Questions were open ended and required thought to answer.
Interview questions [1]
Question 1
One question that seemed strange was "what has been you favorite movie in the past five years and why".